diff --git a/.gitignore b/.gitignore
index 74c83bb..375a2fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,6 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 
 # Finder (MacOS) folder config
 .DS_Store
+
+# TLS certs
+certs/
diff --git a/docs/ggwave-gotchas.md b/docs/ggwave-gotchas.md
index 201f075..9f5fed7 100644
--- a/docs/ggwave-gotchas.md
+++ b/docs/ggwave-gotchas.md
@@ -20,10 +20,8 @@
 - **MacBook Air mic disabled when lid is closed**: If using a monitor, the laptop mic won't work. Use the monitor's mic (e.g., Studio Display) instead.
 - **Sample rate must match**: ggwave needs matching sample rates for encode/decode. Browser uses 48000Hz. Server must also use 48000Hz — sox will resample from the device's native rate automatically.
 
-## SSE with Bun
-
-- Bun's default idle timeout is 10 seconds, which kills SSE connections. Set `idleTimeout: 255` (max value) on `Bun.serve()`.
-
 ## Half-Duplex Audio
 
-- Both sides use the same audible protocol (GGWAVE_PROTOCOL_AUDIBLE_FAST). A `playing` flag stops mic processing during playback to prevent self-hearing/feedback. 300ms gap after playback before resuming listening.
+- Both sides (server and browser) use the same audible protocol (GGWAVE_PROTOCOL_AUDIBLE_FAST). A `playing` flag stops mic processing during playback to prevent self-hearing/feedback. 300ms gap after playback before resuming listening.
+- The browser uses `ScriptProcessorNode` to feed mic audio frames to ggwave for decoding. Frames are accumulated to `samplesPerFrame` size before decoding.
+- Browser mic requires `getUserMedia` with `echoCancellation: false`, `noiseSuppression: false`, `autoGainControl: false` to preserve signal integrity.
diff --git a/src/pages/index.tsx b/src/pages/index.tsx
deleted file mode 100644
index 560503f..0000000
--- a/src/pages/index.tsx
+++ /dev/null
@@ -1 +0,0 @@
-export default () => <h1>baudy</h1>
diff --git a/src/pages/phone.tsx b/src/pages/phone.tsx
new file mode 100644
index 0000000..fd9aa5f
--- /dev/null
+++ b/src/pages/phone.tsx
@@ -0,0 +1,400 @@
+import { define, stylesToCSS } from '@because/forge'
+
+// ---------------------------------------------------------------------------
+// Forge components
+// ---------------------------------------------------------------------------
+
+const Page = define('Page', {
+  fontFamily: '-apple-system, system-ui, sans-serif',
+  background: '#111',
+  color: '#fff',
+  height: '100dvh',
+  width: '100vw',
+  display: 'flex',
+  flexDirection: 'column',
+  alignItems: 'center',
+  justifyContent: 'center',
+  overflow: 'hidden',
+  userSelect: 'none',
+  WebkitUserSelect: 'none',
+  position: 'relative',
+  touchAction: 'manipulation',
+})
+
+const Screen = define('Screen', {
+  display: 'flex',
+  flexDirection: 'column',
+  alignItems: 'center',
+  justifyContent: 'center',
+  flex: 1,
+  width: '100%',
+  padding: 20,
+})
+
+const Title = define('Title', {
+  fontSize: 18,
+  color: '#888',
+  textAlign: 'center',
+  lineHeight: 1.4,
+})
+
+const GuessDisplay = define('GuessDisplay', {
+  fontSize: 96,
+  fontWeight: 'bold',
+  fontFamily: 'monospace',
+  lineHeight: 1,
+  margin: '24px 0',
+})
+
+const Controls = define('Controls', {
+  display: 'flex',
+  gap: 12,
+  marginBottom: 24,
+})
+
+const StepBtn = define('StepBtn', {
+  base: 'button',
+  fontSize: 24,
+  fontWeight: 'bold',
+  width: 64,
+  height: 64,
+  border: 'none',
+  borderRadius: 12,
+  background: '#333',
+  color: '#fff',
+  cursor: 'pointer',
+  WebkitTapHighlightColor: 'transparent',
+  touchAction: 'manipulation',
+  states: { ':active': { background: '#555' } },
+})
+
+const GuessBtn = define('GuessBtn', {
+  base: 'button',
+  fontSize: 24,
+  fontWeight: 'bold',
+  padding: '16px 48px',
+  border: 'none',
+  borderRadius: 16,
+  background: '#22c55e',
+  color: '#fff',
+  cursor: 'pointer',
+  WebkitTapHighlightColor: 'transparent',
+  touchAction: 'manipulation',
+  states: { ':active': { background: '#16a34a' } },
+})
+
+const HintText = define('HintText', {
+  fontSize: 36,
+  fontWeight: 'bold',
+  marginTop: 32,
+  minHeight: 50,
+  display: 'flex',
+  alignItems: 'center',
+  transition: 'opacity 0.15s ease',
+})
+
+const VictoryEmoji = define('VictoryEmoji', {
+  fontSize: 64,
+  marginBottom: 16,
+})
+
+const VictoryText = define('VictoryText', {
+  fontSize: 22,
+  lineHeight: 1.5,
+  textAlign: 'center',
+  padding: '0 20px',
+  maxWidth: 380,
+})
+
+const StatusBar = define('StatusBar', {
+  position: 'fixed',
+  bottom: 0,
+  left: 0,
+  right: 0,
+  padding: 8,
+  fontSize: 12,
+  color: '#555',
+  textAlign: 'center',
+})
+
+const VolumeWarning = define('VolumeWarning', {
+  fontSize: 14,
+  color: '#f59e0b',
+  textAlign: 'center',
+  marginTop: 16,
+  padding: '8px 16px',
+  background: 'rgba(245, 158, 11, 0.1)',
+  borderRadius: 8,
+  border: '1px solid rgba(245, 158, 11, 0.3)',
+})
+
+const ConnectBtn = define('ConnectBtn', {
+  base: 'button',
+  fontSize: 28,
+  fontWeight: 'bold',
+  padding: '20px 48px',
+  border: 'none',
+  borderRadius: 16,
+  background: '#2563eb',
+  color: '#fff',
+  cursor: 'pointer',
+  WebkitTapHighlightColor: 'transparent',
+  touchAction: 'manipulation',
+  states: { ':active': { background: '#1d4ed8' } },
+})
+
+const ConnectStatus = define('ConnectStatus', {
+  fontSize: 18,
+  color: '#888',
+  marginTop: 24,
+  textAlign: 'center',
+})
+
+// ---------------------------------------------------------------------------
+// Client-side code — real functions, serialized into <script>
+// ---------------------------------------------------------------------------
+
+/* eslint-disable */
+// @ts-nocheck — this function is serialized and runs in the browser, not on the server
+function clientMain() {
+  var currentGuess = 50
+  var playing = false
+  var busy = false
+  var gg, ggInstance, audioContext
+  var pendingResolve
+
+  var connectScreen = document.getElementById('connect-screen')
+  var connectStatus = document.getElementById('connect-status')
+  var guessDisplay = document.getElementById('guess-display')
+  var hintArea = document.getElementById('hint-area')
+  var statusEl = document.getElementById('status')
+  var guessBtn = document.getElementById('guess-btn')
+  var gameScreen = document.getElementById('game-screen')
+  var victoryScreen = document.getElementById('victory-screen')
+  var victoryText = document.getElementById('victory-text')
+
+  function bypassSilentMode() {
+    if ('audioSession' in navigator) navigator.audioSession.type = 'play-and-record'
+  }
+
+  function sleep(ms) {
+    return new Promise(function (resolve) { setTimeout(resolve, ms) })
+  }
+
+  function playChirp(text) {
+    var rawBytes = gg.encode(
+      ggInstance, text,
+      gg.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST, 50
+    )
+    var bytesCopy = new Uint8Array(rawBytes.length)
+    bytesCopy.set(new Uint8Array(rawBytes.buffer, rawBytes.byteOffset, rawBytes.length))
+    var floats = new Float32Array(bytesCopy.buffer)
+
+    var buf = audioContext.createBuffer(1, floats.length, audioContext.sampleRate)
+    buf.getChannelData(0).set(floats)
+    var source = audioContext.createBufferSource()
+    source.buffer = buf
+    source.connect(audioContext.destination)
+
+    return new Promise(function (resolve) { source.onended = resolve; source.start() })
+  }
+
+  async function sendAndWait(text, timeoutMs) {
+    playing = true
+    if (audioContext.state === 'suspended') await audioContext.resume()
+    await playChirp(text)
+    await sleep(500)
+    playing = false
+
+    return new Promise(function (resolve) {
+      var timer
+      if (timeoutMs) {
+        timer = setTimeout(function () {
+          pendingResolve = undefined
+          resolve(undefined)
+        }, timeoutMs)
+      }
+      pendingResolve = function (msg) {
+        if (timer) clearTimeout(timer)
+        pendingResolve = undefined
+        resolve(msg)
+      }
+    })
+  }
+
+  function startListening(stream) {
+    var source = audioContext.createMediaStreamSource(stream)
+    var processor = audioContext.createScriptProcessor(4096, 1, 1)
+    var samplesPerFrame = gg.getDefaultParameters().samplesPerFrame
+    var buffer = new Float32Array(0)
+
+    processor.onaudioprocess = function (e) {
+      if (playing) return
+
+      var input = e.inputBuffer.getChannelData(0)
+      var newBuf = new Float32Array(buffer.length + input.length)
+      newBuf.set(buffer)
+      newBuf.set(input, buffer.length)
+      buffer = newBuf
+
+      while (buffer.length >= samplesPerFrame) {
+        var frame = buffer.slice(0, samplesPerFrame)
+        buffer = buffer.slice(samplesPerFrame)
+
+        var bytes = new Uint8Array(frame.buffer, frame.byteOffset, frame.byteLength)
+        var result = gg.decode(ggInstance, bytes)
+        if (result && result.length > 0) {
+          var text = Array.from(result)
+            .map(function (b) { return String.fromCharCode(b & 0xff) })
+            .join('')
+          if (pendingResolve) pendingResolve(text)
+        }
+      }
+    }
+
+    source.connect(processor)
+    processor.connect(audioContext.destination)
+  }
+
+  async function connect() {
+    try {
+      // AudioContext MUST be created synchronously in gesture handler (iOS)
+      audioContext = new (window.AudioContext || window.webkitAudioContext)({ sampleRate: 48000 })
+      var src = audioContext.createBufferSource()
+      src.buffer = audioContext.createBuffer(1, 1, 48000)
+      src.connect(audioContext.destination)
+      src.start()
+      bypassSilentMode()
+
+      connectStatus.textContent = 'Initializing audio (' + audioContext.sampleRate + ' Hz)...'
+      gg = await ggwave_factory()
+      gg.disableLog()
+      var ggParams = gg.getDefaultParameters()
+      ggParams.sampleRateInp = audioContext.sampleRate
+      ggParams.sampleRateOut = audioContext.sampleRate
+      ggParams.sampleRate = audioContext.sampleRate
+      ggInstance = gg.init(ggParams)
+
+      connectStatus.textContent = 'Requesting microphone...'
+      var stream = await navigator.mediaDevices.getUserMedia({
+        audio: { echoCancellation: false, noiseSuppression: false, autoGainControl: false },
+      })
+      startListening(stream)
+
+      connectStatus.textContent = 'Connecting via audio...'
+      var response = await sendAndWait('HELLO', 8000)
+
+      if (response === 'HEY BUDDY') {
+        connectScreen.style.display = 'none'
+        gameScreen.style.display = 'flex'
+        statusEl.textContent = 'Ready'
+      } else {
+        connectStatus.textContent = 'No response heard. Make sure the server is running and volume is up!'
+        connectStatus.style.color = '#ef4444'
+      }
+    } catch (err) {
+      connectStatus.textContent = err.message || 'Failed to connect'
+      connectStatus.style.color = '#ef4444'
+    }
+  }
+
+  async function sendGuess() {
+    if (busy || !gg) return
+    busy = true
+    guessBtn.textContent = 'Sending...'
+    guessBtn.style.background = '#666'
+    hintArea.textContent = ''
+    hintArea.style.opacity = '0'
+
+    statusEl.textContent = 'Listening for response...'
+    guessBtn.textContent = 'Listening...'
+    var response = await sendAndWait(String(currentGuess), 8000)
+
+    if (response === 'Higher!' || response === 'Lower!') {
+      hintArea.style.opacity = '0'
+      hintArea.textContent = response
+      hintArea.style.color = response === 'Higher!' ? '#f59e0b' : '#3b82f6'
+      void hintArea.offsetWidth
+      hintArea.style.opacity = '1'
+    } else if (response === 'Correct!') {
+      gameScreen.style.display = 'none'
+      victoryScreen.style.display = 'flex'
+      victoryText.textContent = 'You found ' + currentGuess + '!'
+      statusEl.textContent = ''
+    } else {
+      hintArea.textContent = 'No response heard. Volume up on both devices!'
+      hintArea.style.color = '#ef4444'
+      hintArea.style.opacity = '1'
+    }
+
+    busy = false
+    guessBtn.textContent = 'Guess!'
+    guessBtn.style.background = '#22c55e'
+    statusEl.textContent = 'Ready'
+  }
+
+  function adjust(delta) {
+    if (busy) return
+    currentGuess = Math.max(1, Math.min(100, currentGuess + delta))
+    guessDisplay.textContent = currentGuess
+    hintArea.textContent = ''
+    hintArea.style.opacity = '0'
+  }
+
+  window.connect = connect
+  window.adjust = function (delta) { adjust(delta) }
+  window.sendGuess = function () { sendGuess() }
+}
+
+// ---------------------------------------------------------------------------
+// Phone page component
+// ---------------------------------------------------------------------------
+
+export function PhonePage() {
+  return (
+    <html>
+      <head>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
+        <title>Corey's Screechy Audio Demo</title>
+        <link rel="stylesheet" href="/styles.css" />
+        <script src="/ggwave.js">{""}</script>
+      </head>
+      <body style="margin:0;overflow:hidden;touch-action:manipulation">
+        <Page>
+          <Screen id="connect-screen">
+            <Title>Corey's Screechy Audio Demo</Title>
+            <VolumeWarning>🔊 Turn your volume up on both devices!</VolumeWarning>
+            <div style="margin-top:32px">
+              <ConnectBtn onclick="connect()">Connect</ConnectBtn>
+            </div>
+            <ConnectStatus id="connect-status" />
+          </Screen>
+
+          <Screen id="game-screen" style="display:none">
+            <Title>Guess the Number<br />1 – 100</Title>
+            <GuessDisplay id="guess-display">50</GuessDisplay>
+            <Controls>
+              <StepBtn onclick="adjust(-10)">-10</StepBtn>
+              <StepBtn onclick="adjust(-1)">-1</StepBtn>
+              <StepBtn onclick="adjust(1)">+1</StepBtn>
+              <StepBtn onclick="adjust(10)">+10</StepBtn>
+            </Controls>
+            <GuessBtn id="guess-btn" onclick="sendGuess()">Guess!</GuessBtn>
+            <HintText id="hint-area" />
+          </Screen>
+
+          <Screen id="victory-screen" style="display:none">
+            <VictoryEmoji>🎉</VictoryEmoji>
+            <VictoryText id="victory-text" />
+          </Screen>
+
+          <StatusBar id="status" />
+        </Page>
+        <script dangerouslySetInnerHTML={{ __html: `(${clientMain})()` }} />
+      </body>
+    </html>
+  )
+}
+
+export { stylesToCSS }
diff --git a/src/server/audio.ts b/src/server/audio.ts
new file mode 100644
index 0000000..96b4d62
--- /dev/null
+++ b/src/server/audio.ts
@@ -0,0 +1,143 @@
+import factory from 'ggwave'
+
+export const SAMPLE_RATE = 48000
+
+const ggwave = await factory()
+const params = ggwave.getDefaultParameters()
+params.sampleRateInp = SAMPLE_RATE
+params.sampleRateOut = SAMPLE_RATE
+params.sampleRate = SAMPLE_RATE
+const instance = ggwave.init(params)
+
+let playing = false
+
+function decodeBytes(data: Int8Array): string {
+  return Array.from(data).map(b => String.fromCharCode(b & 0xff)).join('')
+}
+
+export async function playAudio(text: string) {
+  playing = true
+
+  const waveform = ggwave.encode(
+    instance, text,
+    ggwave.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST,
+    50
+  )
+  const rawBytes = new Uint8Array(waveform.length)
+  rawBytes.set(new Uint8Array(waveform.buffer, waveform.byteOffset, waveform.length))
+
+  const play = Bun.spawn(
+    ['sox', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-', '-d'],
+    { stdin: 'pipe', stdout: 'ignore', stderr: 'ignore' }
+  )
+  play.stdin.write(rawBytes)
+  play.stdin.end()
+  await play.exited
+
+  await new Promise(r => setTimeout(r, 300))
+  playing = false
+}
+
+export async function loopbackTest(): Promise<boolean> {
+  const testMessage = 'TEST'
+
+  const mic = Bun.spawn(
+    ['sox', '-d', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-'],
+    { stdout: 'pipe', stderr: 'ignore' }
+  )
+
+  await new Promise(r => setTimeout(r, 200))
+
+  const waveform = ggwave.encode(
+    instance, testMessage,
+    ggwave.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST,
+    50
+  )
+  const rawBytes = new Uint8Array(waveform.length)
+  rawBytes.set(new Uint8Array(waveform.buffer, waveform.byteOffset, waveform.length))
+
+  const play = Bun.spawn(
+    ['sox', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-', '-d'],
+    { stdin: 'pipe', stdout: 'ignore', stderr: 'ignore' }
+  )
+  play.stdin.write(rawBytes)
+  play.stdin.end()
+  await play.exited
+
+  const reader = mic.stdout.getReader()
+  const bytesPerFrame = params.samplesPerFrame * 4
+  let buffer = new Uint8Array(0)
+  let decoded = false
+
+  const timeout = setTimeout(() => { mic.kill() }, 5000)
+
+  try {
+    while (true) {
+      const { done, value } = await reader.read()
+      if (done) break
+
+      const newBuf = new Uint8Array(buffer.length + value.length)
+      newBuf.set(buffer)
+      newBuf.set(value, buffer.length)
+      buffer = newBuf
+
+      while (buffer.length >= bytesPerFrame) {
+        const frame = buffer.slice(0, bytesPerFrame)
+        buffer = buffer.slice(bytesPerFrame)
+
+        const result = ggwave.decode(instance, frame)
+        if (result && result.length > 0) {
+          const text = decodeBytes(result)
+          if (text === testMessage) {
+            decoded = true
+            mic.kill()
+            break
+          }
+        }
+      }
+      if (decoded) break
+    }
+  } catch {
+    // reader closed from kill
+  }
+
+  clearTimeout(timeout)
+  return decoded
+}
+
+export function startMicListener(onMessage: (text: string) => void) {
+  const sox = Bun.spawn(
+    ['sox', '-d', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-'],
+    { stdout: 'pipe', stderr: 'ignore' }
+  )
+
+  const reader = sox.stdout.getReader()
+  const bytesPerFrame = params.samplesPerFrame * 4
+  let buffer = new Uint8Array(0)
+
+  async function processAudio() {
+    while (true) {
+      const { done, value } = await reader.read()
+      if (done) break
+      if (playing) continue
+
+      const newBuf = new Uint8Array(buffer.length + value.length)
+      newBuf.set(buffer)
+      newBuf.set(value, buffer.length)
+      buffer = newBuf
+
+      while (buffer.length >= bytesPerFrame) {
+        const frame = buffer.slice(0, bytesPerFrame)
+        buffer = buffer.slice(bytesPerFrame)
+
+        const decoded = ggwave.decode(instance, frame)
+        if (decoded && decoded.length > 0) {
+          const text = decodeBytes(decoded)
+          onMessage(text)
+        }
+      }
+    }
+  }
+
+  processAudio().catch(err => console.error('Mic error:', err))
+}
diff --git a/src/server/game.ts b/src/server/game.ts
new file mode 100644
index 0000000..066b3f3
--- /dev/null
+++ b/src/server/game.ts
@@ -0,0 +1,41 @@
+import { playAudio } from './audio'
+
+let secret = randomNumber()
+let guessCount = 0
+
+function randomNumber() {
+  return Math.floor(Math.random() * 100) + 1
+}
+
+export function getSecret() {
+  return secret
+}
+
+export type GuessResult = {
+  type: 'higher' | 'lower' | 'correct'
+  guess: number
+  guessCount: number
+}
+
+export async function handleGuess(guessStr: string): Promise<GuessResult | undefined> {
+  const guess = parseInt(guessStr, 10)
+  if (isNaN(guess) || guess < 1 || guess > 100) return
+
+  guessCount++
+
+  if (guess < secret) {
+    await playAudio('Higher!')
+    return { type: 'higher', guess, guessCount }
+  }
+
+  if (guess > secret) {
+    await playAudio('Lower!')
+    return { type: 'lower', guess, guessCount }
+  }
+
+  await playAudio('Correct!')
+  const result: GuessResult = { type: 'correct', guess, guessCount }
+  secret = randomNumber()
+  guessCount = 0
+  return result
+}
diff --git a/src/server/index.tsx b/src/server/index.tsx
index e7687b1..171620c 100644
--- a/src/server/index.tsx
+++ b/src/server/index.tsx
@@ -1,644 +1,8 @@
 import { Hype } from '@because/hype'
-import { define, stylesToCSS } from '@because/forge'
-import factory from 'ggwave'
-import { networkInterfaces } from 'os'
+import { PhonePage, stylesToCSS } from '../pages/phone'
+import { startup } from './terminal'
 
 const PORT = Number(process.env.PORT) || 3000
-const SAMPLE_RATE = 48000
-
-// ---------------------------------------------------------------------------
-// ggwave
-// ---------------------------------------------------------------------------
-
-const ggwave = await factory()
-const params = ggwave.getDefaultParameters()
-params.sampleRateInp = SAMPLE_RATE
-params.sampleRateOut = SAMPLE_RATE
-params.sampleRate = SAMPLE_RATE
-const instance = ggwave.init(params)
-
-// ---------------------------------------------------------------------------
-// Game state
-// ---------------------------------------------------------------------------
-
-let secret = randomNumber()
-let guessCount = 0
-let playing = false
-
-function randomNumber() {
-  return Math.floor(Math.random() * 100) + 1
-}
-
-// ---------------------------------------------------------------------------
-// ANSI helpers
-// ---------------------------------------------------------------------------
-
-const RESET = '\x1b[0m'
-const BOLD = '\x1b[1m'
-const DIM = '\x1b[2m'
-const GREEN = '\x1b[32m'
-const YELLOW = '\x1b[33m'
-const BLUE = '\x1b[34m'
-const CYAN = '\x1b[36m'
-const MAGENTA = '\x1b[35m'
-const RED = '\x1b[31m'
-
-// ---------------------------------------------------------------------------
-// Terminal I/O
-// ---------------------------------------------------------------------------
-
-async function prompt(question: string): Promise<string> {
-  process.stdout.write(question)
-  for await (const line of console) {
-    return line.trim()
-  }
-  return ''
-}
-
-// ---------------------------------------------------------------------------
-// SSE
-// ---------------------------------------------------------------------------
-
-type Sender = (data: Record<string, unknown>) => void
-const senders = new Set<Sender>()
-
-function broadcast(data: Record<string, unknown>) {
-  for (const send of senders) {
-    try { send(data) }
-    catch { senders.delete(send) }
-  }
-}
-
-// ---------------------------------------------------------------------------
-// Audio helpers
-// ---------------------------------------------------------------------------
-
-function decodeBytes(data: Int8Array): string {
-  return Array.from(data).map(b => String.fromCharCode(b & 0xff)).join('')
-}
-
-function getDeviceName(type: 'input' | 'output'): string {
-  const args = type === 'input' ? ['-c', '-t', 'input'] : ['-c']
-  const proc = Bun.spawnSync(['SwitchAudioSource', ...args])
-  if (proc.exitCode === 0) return proc.stdout.toString().trim()
-  return 'system default'
-}
-
-async function playAudio(text: string) {
-  playing = true
-
-  const waveform = ggwave.encode(
-    instance, text,
-    ggwave.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST,
-    50
-  )
-  const rawBytes = new Uint8Array(waveform.length)
-  rawBytes.set(new Uint8Array(waveform.buffer, waveform.byteOffset, waveform.length))
-
-  const play = Bun.spawn(
-    ['sox', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-', '-d'],
-    { stdin: 'pipe', stdout: 'ignore', stderr: 'ignore' }
-  )
-  play.stdin.write(rawBytes)
-  play.stdin.end()
-  await play.exited
-
-  await new Promise(r => setTimeout(r, 300))
-  playing = false
-}
-
-
-async function loopbackTest(): Promise<boolean> {
-  const testMessage = 'TEST'
-
-  // Start mic listener
-  const mic = Bun.spawn(
-    ['sox', '-d', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-'],
-    { stdout: 'pipe', stderr: 'ignore' }
-  )
-
-  // Small delay for mic to start
-  await new Promise(r => setTimeout(r, 200))
-
-  // Play the test chirp
-  const waveform = ggwave.encode(
-    instance, testMessage,
-    ggwave.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST,
-    50
-  )
-  const rawBytes = new Uint8Array(waveform.length)
-  rawBytes.set(new Uint8Array(waveform.buffer, waveform.byteOffset, waveform.length))
-
-  const play = Bun.spawn(
-    ['sox', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-', '-d'],
-    { stdin: 'pipe', stdout: 'ignore', stderr: 'ignore' }
-  )
-  play.stdin.write(rawBytes)
-  play.stdin.end()
-  await play.exited
-
-  // Listen for a bit to decode
-  const reader = mic.stdout.getReader()
-  const bytesPerFrame = params.samplesPerFrame * 4
-  let buffer = new Uint8Array(0)
-  let decoded = false
-
-  const timeout = setTimeout(() => {
-    mic.kill()
-  }, 5000)
-
-  try {
-    while (true) {
-      const { done, value } = await reader.read()
-      if (done) break
-
-      const newBuf = new Uint8Array(buffer.length + value.length)
-      newBuf.set(buffer)
-      newBuf.set(value, buffer.length)
-      buffer = newBuf
-
-      while (buffer.length >= bytesPerFrame) {
-        const frame = buffer.slice(0, bytesPerFrame)
-        buffer = buffer.slice(bytesPerFrame)
-
-        const result = ggwave.decode(instance, frame)
-        if (result && result.length > 0) {
-          const text = decodeBytes(result)
-          if (text === testMessage) {
-            decoded = true
-            mic.kill()
-            break
-          }
-        }
-      }
-      if (decoded) break
-    }
-  } catch {
-    // reader closed from kill, that's fine
-  }
-
-  clearTimeout(timeout)
-  return decoded
-}
-
-// ---------------------------------------------------------------------------
-// Mic listener
-// ---------------------------------------------------------------------------
-
-function startMicListener() {
-  const sox = Bun.spawn(
-    ['sox', '-d', '-t', 'raw', '-r', String(SAMPLE_RATE), '-c', '1', '-b', '32', '-e', 'floating-point', '-'],
-    { stdout: 'pipe', stderr: 'ignore' }
-  )
-
-  const reader = sox.stdout.getReader()
-  const bytesPerFrame = params.samplesPerFrame * 4
-  let buffer = new Uint8Array(0)
-
-  async function processAudio() {
-    while (true) {
-      const { done, value } = await reader.read()
-      if (done) break
-      if (playing) continue
-
-      const newBuf = new Uint8Array(buffer.length + value.length)
-      newBuf.set(buffer)
-      newBuf.set(value, buffer.length)
-      buffer = newBuf
-
-      while (buffer.length >= bytesPerFrame) {
-        const frame = buffer.slice(0, bytesPerFrame)
-        buffer = buffer.slice(bytesPerFrame)
-
-        const decoded = ggwave.decode(instance, frame)
-        if (decoded && decoded.length > 0) {
-          const text = decodeBytes(decoded)
-          handleGuess(text)
-        }
-      }
-    }
-  }
-
-  processAudio().catch(err => console.error('Mic error:', err))
-}
-
-// ---------------------------------------------------------------------------
-// Game logic
-// ---------------------------------------------------------------------------
-
-async function handleGuess(guessStr: string) {
-  const guess = parseInt(guessStr, 10)
-  if (isNaN(guess) || guess < 1 || guess > 100) return
-
-  guessCount++
-
-  if (guess < secret) {
-    const hint = 'Higher!'
-    console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${YELLOW}📢 ${hint}${RESET}`)
-    broadcast({ type: 'hint', hint, guessCount })
-    await playAudio(hint)
-    return
-  }
-
-  if (guess > secret) {
-    const hint = 'Lower!'
-    console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${BLUE}📢 ${hint}${RESET}`)
-    broadcast({ type: 'hint', hint, guessCount })
-    await playAudio(hint)
-    return
-  }
-
-  // Correct!
-  console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${GREEN}🎉 CORRECT!${RESET}`)
-
-  const victoryMessage = [
-    `Congratulations! You found ${guess} in ${guessCount} ${guessCount === 1 ? 'guess' : 'guesses'}!`,
-    `This entire message was transmitted through sound waves using ggwave audio encoding at 48kHz.`,
-    `Each chirp you heard carried data through the air — no network, no bluetooth, just sound.`,
-    `The future of data-over-sound is here!`,
-  ].join(' ')
-
-  broadcast({ type: 'sending_victory' })
-
-  console.log()
-  console.log(`${MAGENTA}📢 Sending victory message...${RESET}`)
-
-  const maxChunk = 100
-  const chunks: string[] = []
-  for (let i = 0; i < victoryMessage.length; i += maxChunk) {
-    chunks.push(victoryMessage.slice(i, i + maxChunk))
-  }
-
-  for (let i = 0; i < chunks.length; i++) {
-    console.log(`${DIM}  chunk ${i + 1}/${chunks.length}: "${chunks[i]!.slice(0, 40)}..."${RESET}`)
-    await playAudio(chunks[i]!)
-  }
-
-  console.log(`${GREEN}✓ Victory message sent (${victoryMessage.length} bytes in ${chunks.length} chunks)${RESET}`)
-  console.log()
-
-  broadcast({ type: 'victory', message: victoryMessage })
-
-  secret = randomNumber()
-  guessCount = 0
-  console.log(`${CYAN}New round! Secret number: ${BOLD}${secret}${RESET}`)
-  console.log(`${'─'.repeat(40)}`)
-  console.log()
-}
-
-// ---------------------------------------------------------------------------
-// Forge components (phone UI)
-// ---------------------------------------------------------------------------
-
-const Page = define('Page', {
-  fontFamily: '-apple-system, system-ui, sans-serif',
-  background: '#111',
-  color: '#fff',
-  height: '100dvh',
-  width: '100vw',
-  display: 'flex',
-  flexDirection: 'column',
-  alignItems: 'center',
-  justifyContent: 'center',
-  overflow: 'hidden',
-  userSelect: 'none',
-  WebkitUserSelect: 'none',
-  position: 'relative',
-  touchAction: 'manipulation',
-})
-
-const Screen = define('Screen', {
-  display: 'flex',
-  flexDirection: 'column',
-  alignItems: 'center',
-  justifyContent: 'center',
-  flex: 1,
-  width: '100%',
-  padding: 20,
-})
-
-const Title = define('Title', {
-  fontSize: 18,
-  color: '#888',
-  textAlign: 'center',
-  lineHeight: 1.4,
-})
-
-const GuessDisplay = define('GuessDisplay', {
-  fontSize: 96,
-  fontWeight: 'bold',
-  fontFamily: 'monospace',
-  lineHeight: 1,
-  margin: '24px 0',
-})
-
-const Controls = define('Controls', {
-  display: 'flex',
-  gap: 12,
-  marginBottom: 24,
-})
-
-const StepBtn = define('StepBtn', {
-  base: 'button',
-  fontSize: 24,
-  fontWeight: 'bold',
-  width: 64,
-  height: 64,
-  border: 'none',
-  borderRadius: 12,
-  background: '#333',
-  color: '#fff',
-  cursor: 'pointer',
-  WebkitTapHighlightColor: 'transparent',
-  touchAction: 'manipulation',
-  states: { ':active': { background: '#555' } },
-})
-
-const GuessBtn = define('GuessBtn', {
-  base: 'button',
-  fontSize: 24,
-  fontWeight: 'bold',
-  padding: '16px 48px',
-  border: 'none',
-  borderRadius: 16,
-  background: '#22c55e',
-  color: '#fff',
-  cursor: 'pointer',
-  WebkitTapHighlightColor: 'transparent',
-  touchAction: 'manipulation',
-  states: { ':active': { background: '#16a34a' } },
-})
-
-const HintText = define('HintText', {
-  fontSize: 36,
-  fontWeight: 'bold',
-  marginTop: 32,
-  minHeight: 50,
-  display: 'flex',
-  alignItems: 'center',
-  transition: 'opacity 0.15s ease',
-})
-
-const BigButton = define('BigButton', {
-  base: 'button',
-  fontSize: 28,
-  fontWeight: 'bold',
-  padding: '20px 48px',
-  border: 'none',
-  borderRadius: 16,
-  background: '#2563eb',
-  color: '#fff',
-  cursor: 'pointer',
-  WebkitTapHighlightColor: 'transparent',
-  touchAction: 'manipulation',
-  states: { ':active': { background: '#1d4ed8' } },
-})
-
-const VictoryText = define('VictoryText', {
-  fontSize: 22,
-  lineHeight: 1.5,
-  textAlign: 'center',
-  padding: '0 20px',
-  maxWidth: 380,
-})
-
-const StatusBar = define('StatusBar', {
-  position: 'fixed',
-  bottom: 0,
-  left: 0,
-  right: 0,
-  padding: '8px',
-  fontSize: 12,
-  color: '#555',
-  textAlign: 'center',
-})
-
-const VolumeWarning = define('VolumeWarning', {
-  fontSize: 14,
-  color: '#f59e0b',
-  textAlign: 'center',
-  marginTop: 16,
-  padding: '8px 16px',
-  background: 'rgba(245, 158, 11, 0.1)',
-  borderRadius: 8,
-  border: '1px solid rgba(245, 158, 11, 0.3)',
-})
-
-// ---------------------------------------------------------------------------
-// Client script
-// ---------------------------------------------------------------------------
-
-const clientScript = `
-let currentGuess = 50
-let gg, ggInstance, audioContext
-let sending = false
-let waitTimeout
-let guessSentAt = 0
-
-const gameScreen = document.getElementById('game-screen')
-const victoryScreen = document.getElementById('victory-screen')
-const guessDisplay = document.getElementById('guess-display')
-const hintArea = document.getElementById('hint-area')
-const statusEl = document.getElementById('status')
-const guessBtn = document.getElementById('guess-btn')
-const victoryText = document.getElementById('victory-text')
-const volumeWarning = document.getElementById('volume-warning')
-
-function bypassSilentMode() {
-  if ('audioSession' in navigator) navigator.audioSession.type = 'playback'
-}
-
-async function init() {
-  // AudioContext must be created synchronously in gesture handler (iOS)
-  audioContext = new (window.AudioContext || window.webkitAudioContext)({ sampleRate: 48000 })
-  const src = audioContext.createBufferSource()
-  src.buffer = audioContext.createBuffer(1, 1, 48000)
-  src.connect(audioContext.destination)
-  src.start()
-  bypassSilentMode()
-
-  statusEl.textContent = 'Initializing audio...'
-  gg = await ggwave_factory()
-  gg.disableLog()
-  ggInstance = gg.init(gg.getDefaultParameters())
-
-  statusEl.textContent = 'Ready'
-}
-
-async function sendGuess() {
-  if (sending || !gg) return
-  sending = true
-  guessSentAt = Date.now()
-  guessBtn.textContent = 'Sending...'
-  guessBtn.style.background = '#666'
-  if (volumeWarning) volumeWarning.style.display = 'none'
-
-  hintArea.textContent = ''
-  hintArea.style.opacity = '0'
-
-  const text = String(currentGuess)
-  if (audioContext.state === 'suspended') await audioContext.resume()
-
-  const rawBytes = gg.encode(ggInstance, text, gg.ProtocolId.GGWAVE_PROTOCOL_AUDIBLE_FAST, 50)
-  const bytesCopy = new Uint8Array(rawBytes.length)
-  bytesCopy.set(new Uint8Array(rawBytes.buffer, rawBytes.byteOffset, rawBytes.length))
-  const floats = new Float32Array(bytesCopy.buffer)
-
-  const buf = audioContext.createBuffer(1, floats.length, 48000)
-  buf.getChannelData(0).set(floats)
-  const source = audioContext.createBufferSource()
-  source.buffer = buf
-  source.connect(audioContext.destination)
-
-  await new Promise(resolve => { source.onended = resolve; source.start() })
-  guessBtn.textContent = 'Waiting...'
-  statusEl.textContent = 'Waiting for response...'
-
-  // If no SSE response within 1.5s, show volume hint and unlock
-  waitTimeout = setTimeout(function() {
-    hintArea.style.opacity = '0'
-    hintArea.textContent = "Failed to hear response. Make sure the computer volume is turned up!"
-    hintArea.style.color = '#ef4444'
-    void hintArea.offsetWidth
-    hintArea.style.opacity = '1'
-    unlockSending()
-  }, 5000)
-}
-
-function unlockSending() {
-  if (waitTimeout) { clearTimeout(waitTimeout); waitTimeout = undefined }
-  sending = false
-  guessBtn.textContent = 'Guess!'
-  guessBtn.style.background = '#22c55e'
-  statusEl.textContent = 'Ready'
-}
-
-function adjust(delta) {
-  if (sending) return
-  currentGuess = Math.max(1, Math.min(100, currentGuess + delta))
-  guessDisplay.textContent = currentGuess
-  hintArea.textContent = ''
-  hintArea.style.opacity = '0'
-}
-
-// SSE
-const events = new EventSource('/events')
-events.onmessage = function(e) {
-  const data = JSON.parse(e.data)
-
-  if (data.type === 'hint') {
-    var elapsed = Date.now() - guessSentAt
-    var remaining = Math.max(0, 2000 - elapsed)
-    setTimeout(function() {
-      hintArea.style.opacity = '0'
-      hintArea.textContent = data.hint
-      hintArea.style.color = data.hint === 'Higher!' ? '#f59e0b' : '#3b82f6'
-      void hintArea.offsetWidth
-      hintArea.style.opacity = '1'
-      unlockSending()
-    }, remaining)
-  }
-
-  if (data.type === 'sending_victory') {
-    hintArea.textContent = '🎉'
-    hintArea.style.color = '#22c55e'
-    guessBtn.textContent = 'Receiving...'
-    guessBtn.style.background = '#666'
-    statusEl.textContent = 'Receiving victory message...'
-  }
-
-  if (data.type === 'victory') {
-    gameScreen.style.display = 'none'
-    victoryScreen.style.display = 'flex'
-    victoryText.textContent = data.message
-    statusEl.textContent = ''
-  }
-
-  if (data.type === 'new_game') {
-    currentGuess = 50
-    guessDisplay.textContent = '50'
-    hintArea.textContent = ''
-    hintArea.style.color = '#fff'
-    victoryScreen.style.display = 'none'
-    gameScreen.style.display = 'flex'
-    unlockSending()
-  }
-}
-
-// Auto-init audio on first interaction
-let initialized = false
-async function ensureInit() {
-  if (initialized) return
-  initialized = true
-  await init()
-}
-
-// Button handlers
-document.getElementById('guess-btn').addEventListener('click', async function() {
-  await ensureInit()
-  sendGuess()
-})
-document.getElementById('btn-minus-10').addEventListener('click', async function() { await ensureInit(); adjust(-10) })
-document.getElementById('btn-minus-1').addEventListener('click', async function() { await ensureInit(); adjust(-1) })
-document.getElementById('btn-plus-1').addEventListener('click', async function() { await ensureInit(); adjust(1) })
-document.getElementById('btn-plus-10').addEventListener('click', async function() { await ensureInit(); adjust(10) })
-document.getElementById('play-again-btn').addEventListener('click', async function() {
-  await fetch('/new-game', { method: 'POST' })
-})
-`
-
-// ---------------------------------------------------------------------------
-// Phone page
-// ---------------------------------------------------------------------------
-
-function PhonePage() {
-  return (
-    <html>
-      <head>
-        <meta charset="UTF-8" />
-        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
-        <title>Corey's Screechy Audio Demo</title>
-        <link rel="stylesheet" href="/styles.css" />
-        <script src="/ggwave.js">{""}</script>
-      </head>
-      <body style="margin:0;overflow:hidden;touch-action:manipulation">
-        <Page>
-          {/* Game screen */}
-          <Screen id="game-screen">
-            <Title>Guess the Number<br />1 – 100</Title>
-            <GuessDisplay id="guess-display">50</GuessDisplay>
-            <Controls>
-              <StepBtn id="btn-minus-10">-10</StepBtn>
-              <StepBtn id="btn-minus-1">-1</StepBtn>
-              <StepBtn id="btn-plus-1">+1</StepBtn>
-              <StepBtn id="btn-plus-10">+10</StepBtn>
-            </Controls>
-            <GuessBtn id="guess-btn">Guess!</GuessBtn>
-            <HintText id="hint-area" />
-            <VolumeWarning id="volume-warning">🔊 Volume up! You should hear a chirp when you tap Guess.</VolumeWarning>
-          </Screen>
-
-          {/* Victory screen */}
-          <Screen id="victory-screen" style="display:none">
-            <div style="font-size:64px;margin-bottom:16px">🎉</div>
-            <VictoryText id="victory-text" />
-            <div style="margin-top:32px">
-              <BigButton id="play-again-btn">Play Again</BigButton>
-            </div>
-          </Screen>
-
-          <StatusBar id="status">Ready</StatusBar>
-        </Page>
-        <script src="/client.js">{""}</script>
-      </body>
-    </html>
-  )
-}
-
-// ---------------------------------------------------------------------------
-// Hype app
-// ---------------------------------------------------------------------------
-
 const app = new Hype({ layout: false, logging: false })
 
 app.get('/ok', c => c.text('ok'))
@@ -649,134 +13,20 @@ app.get('/styles.css', c =>
 
 app.get('/', c => c.html(<PhonePage />))
 
-app.get('/client.js', c =>
-  c.text(clientScript, 200, { 'Content-Type': 'application/javascript' })
-)
-
 app.get('/ggwave.js', () =>
   new Response(Bun.file(new URL(import.meta.resolve('ggwave/ggwave.js')).pathname), {
     headers: { 'Content-Type': 'application/javascript' },
   })
 )
 
-app.sse('/events', (send, c) => {
-  senders.add(send)
-  send({ type: 'connected' })
-  console.log(`${GREEN}Player connected!${RESET}`)
-  return () => {
-    senders.delete(send)
-    console.log(`${DIM}Player disconnected${RESET}`)
-  }
-})
+startup(PORT)
 
-app.post('/new-game', c => {
-  secret = randomNumber()
-  guessCount = 0
-  broadcast({ type: 'new_game' })
-  console.log()
-  console.log(`${CYAN}New round! Secret number: ${BOLD}${secret}${RESET}`)
-  console.log(`${'─'.repeat(40)}`)
-  console.log()
-  return c.text('ok')
-})
-
-// ---------------------------------------------------------------------------
-// Startup — stepped, one thing at a time
-// ---------------------------------------------------------------------------
-
-function getLocalIP() {
-  const nets = networkInterfaces()
-  for (const name of Object.keys(nets)) {
-    for (const net of nets[name]!) {
-      if (net.family === 'IPv4' && !net.internal) return net.address
-    }
-  }
-  return 'localhost'
+export default {
+  ...app.defaults,
+  port: PORT,
+  idleTimeout: 255,
+  tls: {
+    key: Bun.file('./certs/key.pem'),
+    cert: Bun.file('./certs/cert.pem'),
+  },
 }
-
-async function startup() {
-  const soxCheck = Bun.spawnSync(['which', 'sox'])
-  if (soxCheck.exitCode !== 0) {
-    console.error(`\n  ${BOLD}sox is not installed.${RESET} Run: brew install sox\n`)
-    process.exit(1)
-  }
-
-  // ── Step 1: Audio loopback test ────────────────────────────────────────
-  console.clear()
-  console.log()
-  console.log(`${BOLD}Corey's Screechy Audio Demo${RESET}`)
-  console.log()
-
-  const speaker = getDeviceName('output')
-  const mic = getDeviceName('input')
-  console.log(`${BOLD}Speaker:${RESET}    ${GREEN}${speaker}${RESET}`)
-  console.log(`${BOLD}Microphone:${RESET} ${GREEN}${mic}${RESET}`)
-  console.log()
-
-  console.log(`${YELLOW}${BOLD}🔊 Turn your volume up!${RESET}`)
-  console.log(`${DIM}Testing audio: playing a chirp and listening for it...${RESET}`)
-  console.log()
-
-  const loopbackOk = await loopbackTest()
-
-  if (loopbackOk) {
-    console.log(`${GREEN}${BOLD}✓ Audio working!${RESET} ${DIM}Speaker → mic pipeline verified${RESET}`)
-  } else {
-    console.log(`${RED}${BOLD}✗ Couldn't hear the test chirp.${RESET}`)
-    console.log()
-    console.log(`${YELLOW}Try:${RESET}`)
-    console.log(`  • Turn your volume up`)
-    console.log(`  • Check System Settings > Sound (output: "${speaker}", input: "${mic}")`)
-    console.log(`  • Disconnect headphones — sound needs to travel through the air`)
-    console.log()
-    await prompt(`  Press Enter to continue anyway... `)
-  }
-
-  // ── Step 2: Show QR code ──────────────────────────────────────────────
-  console.clear()
-  console.log()
-  console.log(`${BOLD}Corey's Screechy Audio Demo${RESET}`)
-  console.log(`${DIM}Speaker: ${speaker} · Mic: ${mic}${RESET}`)
-  console.log()
-
-  const ip = getLocalIP()
-  const url = `http://${ip}:${PORT}`
-
-  console.log(`${GREEN}${BOLD}Scan QR code on your phone to play!${RESET}`)
-  console.log()
-
-  try {
-    const QRCode = await import('qrcode')
-    const qr = await QRCode.toString(url, { type: 'terminal', small: true })
-    console.log(qr)
-  } catch {
-    console.log(`${BOLD}${CYAN}${url}${RESET}`)
-    console.log()
-  }
-
-  console.log(`${DIM}Waiting for player...${RESET}`)
-  console.log()
-
-  // Wait for first SSE connection before showing game state
-  await new Promise<void>(resolve => {
-    const check = setInterval(() => {
-      if (senders.size > 0) {
-        clearInterval(check)
-        resolve()
-      }
-    }, 100)
-  })
-
-  // ── Step 3: Game on ───────────────────────────────────────────────────
-  console.log()
-  console.log(`${BOLD}Secret number: ${GREEN}${secret}${RESET}`)
-  console.log(`${'─'.repeat(40)}`)
-  console.log(`${DIM}🎤 Listening for guesses...${RESET}`)
-  console.log()
-
-  startMicListener()
-}
-
-startup()
-
-export default { ...app.defaults, port: PORT, idleTimeout: 255 }
diff --git a/src/server/terminal.ts b/src/server/terminal.ts
new file mode 100644
index 0000000..d73a9a9
--- /dev/null
+++ b/src/server/terminal.ts
@@ -0,0 +1,129 @@
+import { loopbackTest, playAudio, startMicListener } from './audio'
+import { handleGuess, getSecret } from './game'
+import type { GuessResult } from './game'
+
+const RESET = '\x1b[0m'
+const BOLD = '\x1b[1m'
+const DIM = '\x1b[2m'
+const GREEN = '\x1b[32m'
+const YELLOW = '\x1b[33m'
+const BLUE = '\x1b[34m'
+const CYAN = '\x1b[36m'
+const RED = '\x1b[31m'
+
+async function prompt(question: string): Promise<string> {
+  process.stdout.write(question)
+  for await (const line of console) {
+    return line.trim()
+  }
+  return ''
+}
+
+function getLocalHostname() {
+  const proc = Bun.spawnSync(['scutil', '--get', 'LocalHostName'])
+  if (proc.exitCode === 0) return proc.stdout.toString().trim() + '.local'
+  return 'localhost'
+}
+
+function getDeviceName(type: 'input' | 'output'): string {
+  const args = type === 'input' ? ['-c', '-t', 'input'] : ['-c']
+  const proc = Bun.spawnSync(['SwitchAudioSource', ...args])
+  if (proc.exitCode === 0) return proc.stdout.toString().trim()
+  return 'system default'
+}
+
+function logGuess(result: GuessResult) {
+  const { type, guess, guessCount } = result
+  if (type === 'higher') {
+    console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${YELLOW}📢 Higher!${RESET}`)
+    return
+  }
+  if (type === 'lower') {
+    console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${BLUE}📢 Lower!${RESET}`)
+    return
+  }
+  console.log(`${DIM}Guess #${guessCount}:${RESET}  ${BOLD}${guess}${RESET}  →  ${GREEN}🎉 CORRECT!${RESET}`)
+  console.log()
+  console.log(`${CYAN}New round! Secret number: ${BOLD}${getSecret()}${RESET}`)
+  console.log(`${'─'.repeat(40)}`)
+  console.log()
+}
+
+async function onMessage(text: string) {
+  await Bun.sleep(500)
+
+  if (text === 'HELLO') {
+    console.log(`${GREEN}${BOLD}Player connected via audio!${RESET}`)
+    await playAudio('HEY BUDDY')
+    return
+  }
+
+  const result = await handleGuess(text)
+  if (result) logGuess(result)
+}
+
+export async function startup(port: number) {
+  const soxCheck = Bun.spawnSync(['which', 'sox'])
+  if (soxCheck.exitCode !== 0) {
+    console.error(`\n  ${BOLD}sox is not installed.${RESET} Run: brew install sox\n`)
+    process.exit(1)
+  }
+
+  console.clear()
+  console.log()
+  console.log(`${BOLD}Corey's Screechy Audio Demo${RESET}`)
+  console.log()
+
+  const speaker = getDeviceName('output')
+  const mic = getDeviceName('input')
+  console.log(`${BOLD}Speaker:${RESET}    ${GREEN}${speaker}${RESET}`)
+  console.log(`${BOLD}Microphone:${RESET} ${GREEN}${mic}${RESET}`)
+  console.log()
+
+  console.log(`${YELLOW}${BOLD}🔊 Turn your volume up!${RESET}`)
+  console.log(`${DIM}Testing audio: playing a chirp and listening for it...${RESET}`)
+  console.log()
+
+  const loopbackOk = await loopbackTest()
+
+  if (loopbackOk) {
+    console.log(`${GREEN}${BOLD}✓ Audio working!${RESET} ${DIM}Speaker → mic pipeline verified${RESET}`)
+  } else {
+    console.log(`${RED}${BOLD}✗ Couldn't hear the test chirp.${RESET}`)
+    console.log()
+    console.log(`${YELLOW}Try:${RESET}`)
+    console.log(`  • Turn your volume up`)
+    console.log(`  • Check System Settings > Sound (output: "${speaker}", input: "${mic}")`)
+    console.log(`  • Disconnect headphones — sound needs to travel through the air`)
+    console.log()
+    await prompt(`  Press Enter to continue anyway... `)
+  }
+
+  console.clear()
+  console.log()
+  console.log(`${BOLD}Corey's Screechy Audio Demo${RESET}`)
+  console.log(`${DIM}Speaker: ${speaker} · Mic: ${mic}${RESET}`)
+  console.log()
+
+  const hostname = getLocalHostname()
+  const url = `https://${hostname}:${port}`
+
+  console.log(`${GREEN}${BOLD}Scan QR code on your phone to play!${RESET}`)
+  console.log()
+
+  try {
+    const QRCode = await import('qrcode')
+    const qr = await QRCode.toString(url, { type: 'terminal', small: true })
+    console.log(qr)
+  } catch {
+    console.log(`${BOLD}${CYAN}${url}${RESET}`)
+    console.log()
+  }
+
+  console.log(`${BOLD}Secret number: ${GREEN}${getSecret()}${RESET}`)
+  console.log(`${'─'.repeat(40)}`)
+  console.log(`${DIM}🎤 Listening for guesses...${RESET}`)
+  console.log()
+
+  startMicListener(onMessage)
+}