diff --git a/apps/stage-tamagotchi/src/main/index.ts b/apps/stage-tamagotchi/src/main/index.ts
index b0116fc23..b27f479d8 100644
--- a/apps/stage-tamagotchi/src/main/index.ts
+++ b/apps/stage-tamagotchi/src/main/index.ts
@@ -1,5 +1,3 @@
-import type { BrowserWindow } from 'electron'
-
 import { env, platform } from 'node:process'
 
 import { electronApp, optimizer } from '@electron-toolkit/utils'
@@ -79,12 +77,6 @@ app.whenReady().then(async () => {
 
   // BeatSync will create a background window to capture and process audio.
   const beatSync = injeca.provide('windows:beat-sync', () => setupBeatSync())
-  const beatSyncDispatchTo = injeca.provide('windows:beat-sync:dispatch-to', {
-    dependsOn: { beatSync },
-    build: async ({ dependsOn }) => (window: BrowserWindow) => {
-      return dependsOn.beatSync.dispatchTo(window)
-    },
-  })
 
   const chatWindow = injeca.provide('windows:chat', {
     dependsOn: { widgetsManager },
@@ -92,17 +84,13 @@ app.whenReady().then(async () => {
   })
 
   const settingsWindow = injeca.provide('windows:settings', {
-    dependsOn: { widgetsManager, beatSync, beatSyncDispatchTo },
-    build: async ({ dependsOn }) => {
-      return setupSettingsWindowReusableFunc({ ...dependsOn, onWindowCreated: window => dependsOn.beatSyncDispatchTo(window) })
-    },
+    dependsOn: { widgetsManager, beatSync },
+    build: async ({ dependsOn }) => setupSettingsWindowReusableFunc(dependsOn),
   })
 
   const mainWindow = injeca.provide('windows:main', {
-    dependsOn: { settingsWindow, chatWindow, widgetsManager, noticeWindow, beatSync, beatSyncDispatchTo },
-    build: async ({ dependsOn }) => {
-      return setupMainWindow({ ...dependsOn, onWindowCreated: window => dependsOn.beatSyncDispatchTo(window) })
-    },
+    dependsOn: { settingsWindow, chatWindow, widgetsManager, noticeWindow, beatSync },
+    build: async ({ dependsOn }) => setupMainWindow(dependsOn),
   })
 
   const captionWindow = injeca.provide('windows:caption', {
diff --git a/apps/stage-tamagotchi/src/main/tray/index.ts b/apps/stage-tamagotchi/src/main/tray/index.ts
index c35522d73..6653316b6 100644
--- a/apps/stage-tamagotchi/src/main/tray/index.ts
+++ b/apps/stage-tamagotchi/src/main/tray/index.ts
@@ -54,7 +54,7 @@ export function setupTray(params: {
       ...is.dev || env.MAIN_APP_DEBUG || env.APP_DEBUG
         ? [
             { type: 'header', label: 'DevTools' },
-            { label: 'Troubleshoot BeatSync...', click: () => params.beatSyncBgWindow.window.webContents.openDevTools() },
+            { label: 'Troubleshoot BeatSync...', click: () => params.beatSyncBgWindow.webContents.openDevTools() },
             { type: 'separator' },
           ] as const // :(
         : [],
diff --git a/apps/stage-tamagotchi/src/main/windows/beat-sync/index.ts b/apps/stage-tamagotchi/src/main/windows/beat-sync/index.ts
index b62782bfd..8f30de581 100644
--- a/apps/stage-tamagotchi/src/main/windows/beat-sync/index.ts
+++ b/apps/stage-tamagotchi/src/main/windows/beat-sync/index.ts
@@ -1,26 +1,8 @@
 import { dirname, join, resolve } from 'node:path'
 import { fileURLToPath } from 'node:url'
 
-import { defineInvoke, defineInvokeHandler } from '@moeru/eventa'
-import { createContext } from '@moeru/eventa/adapters/electron/main'
-import {
-  beatSyncBeatSignaledInvokeEventa,
-  beatSyncGetInputByteFrequencyDataInvokeEventa,
-  beatSyncGetStateInvokeEventa,
-  beatSyncStateChangedInvokeEventa,
-  beatSyncToggleInvokeEventa,
-  beatSyncUpdateParametersInvokeEventa,
-} from '@proj-airi/stage-shared/beat-sync'
-import { BrowserWindow, ipcMain } from 'electron'
+import { BrowserWindow } from 'electron'
 
-import {
-  beatSyncElectronChangeState,
-  beatSyncElectronGetInputByteFrequencyData,
-  beatSyncElectronGetState,
-  beatSyncElectronSignalBeat,
-  beatSyncElectronToggle,
-  beatSyncElectronUpdateParameters,
-} from '../../../shared/eventa'
 import { baseUrl, getElectronMainDirname, load } from '../../libs/electron/location'
 
 export async function setupBeatSync() {
@@ -31,37 +13,7 @@ export async function setupBeatSync() {
       sandbox: false,
     },
   })
-  const context = createContext(ipcMain, window).context
-
-  // TODO(Makito): Bypass here with the broadcast channel-based transport when it is released.
-  // [main] -> [renderer] beat-sync
-  const toggle = defineInvoke(context, beatSyncElectronToggle) as (enabled: boolean) => Promise<void> // TODO: Better type
-  const getState = defineInvoke(context, beatSyncElectronGetState)
-  const updateParameters = defineInvoke(context, beatSyncElectronUpdateParameters)
-  const getInputByteFrequencyData = defineInvoke(context, beatSyncElectronGetInputByteFrequencyData)
 
   await load(window, baseUrl(resolve(getElectronMainDirname(), '..', 'renderer'), 'beat-sync.html'))
-  return {
-    window,
-    dispatchTo: (window: BrowserWindow) => {
-      const context = createContext(ipcMain, window).context
-
-      const stateChanged = defineInvoke(context, beatSyncStateChangedInvokeEventa)
-      const beatSignaled = defineInvoke(context, beatSyncBeatSignaledInvokeEventa)
-      const removeHandlerFns = [
-        // [renderer] beat-sync -> [main] -> [renderer] index (Events)
-        defineInvokeHandler(context, beatSyncElectronChangeState, async e => stateChanged(e)),
-        defineInvokeHandler(context, beatSyncElectronSignalBeat, async e => beatSignaled(e)),
-
-        // [renderer] index -> [main] -> [renderer] beat-sync (Functions)
-        defineInvokeHandler(context, beatSyncToggleInvokeEventa, async enabled => toggle(enabled)),
-        defineInvokeHandler(context, beatSyncGetStateInvokeEventa, async () => getState()),
-        defineInvokeHandler(context, beatSyncUpdateParametersInvokeEventa, async params => updateParameters(params)),
-        defineInvokeHandler(context, beatSyncGetInputByteFrequencyDataInvokeEventa, async () => getInputByteFrequencyData()),
-      ]
-      const removeHandlers = () => removeHandlerFns.forEach(fn => fn())
-      window.on('closed', () => removeHandlers())
-      return removeHandlers
-    },
-  }
+  return window
 }
diff --git a/apps/stage-tamagotchi/src/renderer/beat-sync.main.ts b/apps/stage-tamagotchi/src/renderer/beat-sync.main.ts
index 00e2e5c8a..388f8645d 100644
--- a/apps/stage-tamagotchi/src/renderer/beat-sync.main.ts
+++ b/apps/stage-tamagotchi/src/renderer/beat-sync.main.ts
@@ -1,24 +1,22 @@
 import { defineInvoke, defineInvokeHandler } from '@moeru/eventa'
-import { createContext } from '@moeru/eventa/adapters/electron/renderer'
 import { StageEnvironment } from '@proj-airi/stage-shared'
-import { createBeatSyncDetector } from '@proj-airi/stage-shared/beat-sync/browser'
-
 import {
-  beatSyncElectronChangeState,
-  beatSyncElectronGetInputByteFrequencyData,
-  beatSyncElectronGetState,
-  beatSyncElectronSignalBeat,
-  beatSyncElectronToggle,
-  beatSyncElectronUpdateParameters,
-} from '../shared/eventa'
+  beatSyncBeatSignaledInvokeEventa,
+  beatSyncGetInputByteFrequencyDataInvokeEventa,
+  beatSyncGetStateInvokeEventa,
+  beatSyncStateChangedInvokeEventa,
+  beatSyncToggleInvokeEventa,
+  beatSyncUpdateParametersInvokeEventa,
+  createBeatSyncDetector,
+  createContext,
+} from '@proj-airi/stage-shared/beat-sync'
 
 const { ipcRenderer } = window.electron
 
-const context = createContext(ipcRenderer).context
+const context = createContext()
 
-// [renderer] beat-sync -> [main] -> [renderer] index
-const changeState = defineInvoke(context, beatSyncElectronChangeState)
-const signalBeat = defineInvoke(context, beatSyncElectronSignalBeat)
+const changeState = defineInvoke(context, beatSyncStateChangedInvokeEventa)
+const signalBeat = defineInvoke(context, beatSyncBeatSignaledInvokeEventa)
 
 function enableLoopbackAudio() {
   // electron-audio-loopback currently registers this handler internally
@@ -43,7 +41,7 @@ detector.on('beat', (e) => {
   signalBeat(e)
 })
 
-defineInvokeHandler(context, beatSyncElectronToggle, async (enabled) => {
+defineInvokeHandler(context, beatSyncToggleInvokeEventa, async (enabled) => {
   // eslint-disable-next-line no-console
   console.log('[toggle]', enabled)
   if (enabled) {
@@ -53,13 +51,13 @@ defineInvokeHandler(context, beatSyncElectronToggle, async (enabled) => {
     detector.stop()
   }
 })
-defineInvokeHandler(context, beatSyncElectronGetState, async () => detector.state)
-defineInvokeHandler(context, beatSyncElectronUpdateParameters, async (params) => {
+defineInvokeHandler(context, beatSyncGetStateInvokeEventa, async () => detector.state)
+defineInvokeHandler(context, beatSyncUpdateParametersInvokeEventa, async (params) => {
   // eslint-disable-next-line no-console
   console.log('[update-params]', params)
   detector.updateParameters(params)
 })
-defineInvokeHandler(context, beatSyncElectronGetInputByteFrequencyData, async () => {
+defineInvokeHandler(context, beatSyncGetInputByteFrequencyDataInvokeEventa, async () => {
   // eslint-disable-next-line no-console
   console.debug('[get-input-byte-frequency-data]') // This could be noisy.
   return detector.getInputByteFrequencyData()
diff --git a/apps/stage-tamagotchi/src/shared/eventa.ts b/apps/stage-tamagotchi/src/shared/eventa.ts
index d5b469e08..38183462b 100644
--- a/apps/stage-tamagotchi/src/shared/eventa.ts
+++ b/apps/stage-tamagotchi/src/shared/eventa.ts
@@ -74,11 +74,4 @@ export const widgetsRemoveEvent = defineEventa<{ id: string }>('eventa:event:ele
 export const widgetsClearEvent = defineEventa('eventa:event:electron:windows:widgets:clear')
 export const widgetsUpdateEvent = defineEventa<{ id: string, componentProps?: Record<string, any> }>('eventa:event:electron:windows:widgets:update')
 
-export const beatSyncElectronSignalBeat = defineInvokeEventa<void, AnalyserBeatEvent>('eventa:event:electron:beat-sync:electron:signal-beat')
-export const beatSyncElectronChangeState = defineInvokeEventa<void, BeatSyncDetectorState>('eventa:event:electron:beat-sync:electron:change-state')
-export const beatSyncElectronGetState = defineInvokeEventa<BeatSyncDetectorState>('eventa:event:electron:beat-sync:electron:get-state')
-export const beatSyncElectronToggle = defineInvokeEventa<void, boolean>('eventa:event:electron:beat-sync:electron:toggle')
-export const beatSyncElectronUpdateParameters = defineInvokeEventa<void, Partial<AnalyserWorkletParameters>>('eventa:event:electron:beat-sync:electron:update-parameters')
-export const beatSyncElectronGetInputByteFrequencyData = defineInvokeEventa<Uint8Array<ArrayBuffer>>('eventa:event:electron:beat-sync:electron:get-input-byte-frequency-data')
-
 export { electron } from './electron'
diff --git a/packages/stage-pages/src/pages/settings/modules/beat-sync.vue b/packages/stage-pages/src/pages/settings/modules/beat-sync.vue
index b6ee36458..deeee8ac1 100644
--- a/packages/stage-pages/src/pages/settings/modules/beat-sync.vue
+++ b/packages/stage-pages/src/pages/settings/modules/beat-sync.vue
@@ -10,7 +10,7 @@ import {
   listenBeatSyncStateChange,
   toggleBeatSync,
   updateBeatSyncParameters,
-} from '@proj-airi/stage-shared/beat-sync/browser'
+} from '@proj-airi/stage-shared/beat-sync'
 import { Alert, AudioSpectrumVisualizer } from '@proj-airi/stage-ui/components'
 import { Button, FieldCheckbox, FieldRange } from '@proj-airi/ui'
 import { createTimeline } from 'animejs'
diff --git a/packages/stage-shared/package.json b/packages/stage-shared/package.json
index e2035030c..d5094b038 100644
--- a/packages/stage-shared/package.json
+++ b/packages/stage-shared/package.json
@@ -17,7 +17,6 @@
   "exports": {
     ".": "./src/index.ts",
     "./beat-sync": "./src/beat-sync/index.ts",
-    "./beat-sync/browser": "./src/beat-sync/browser/index.ts",
     "./electron-renderer": "./src/electron-renderer.d.ts"
   },
   "scripts": {
diff --git a/packages/stage-shared/src/beat-sync/browser/eventa.ts b/packages/stage-shared/src/beat-sync/browser/eventa.ts
deleted file mode 100644
index 0844f0f6a..000000000
--- a/packages/stage-shared/src/beat-sync/browser/eventa.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import { createContext as createWebContext } from '@moeru/eventa'
-import { createContext as createElectronRendererContext } from '@moeru/eventa/adapters/electron/renderer'
-import { isElectronWindow } from '@proj-airi/stage-shared'
-
-export function createContext() {
-  if (isElectronWindow(window)) {
-    // TODO(Makito): Replace this with the broadcast channel-based transport when it is released.
-    return createElectronRendererContext(window.electron.ipcRenderer).context
-  }
-  else {
-    return createWebContext()
-  }
-}
diff --git a/packages/stage-shared/src/beat-sync/browser/index.ts b/packages/stage-shared/src/beat-sync/browser/index.ts
deleted file mode 100644
index 178ff3657..000000000
--- a/packages/stage-shared/src/beat-sync/browser/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export * from './detector'
-export * from './eventa'
diff --git a/packages/stage-shared/src/beat-sync/browser/detector.ts b/packages/stage-shared/src/beat-sync/detector.ts
similarity index 98%
rename from packages/stage-shared/src/beat-sync/browser/detector.ts
rename to packages/stage-shared/src/beat-sync/detector.ts
index aca150a26..caab03900 100644
--- a/packages/stage-shared/src/beat-sync/browser/detector.ts
+++ b/packages/stage-shared/src/beat-sync/detector.ts
@@ -1,14 +1,14 @@
 import type { EventContext } from '@moeru/eventa'
 import type { Analyser, AnalyserBeatEvent, AnalyserWorkletParameters } from '@nekopaw/tempora'
 
-import type { BeatSyncDetectorEventMap, BeatSyncDetectorState } from '../types'
+import type { BeatSyncDetectorEventMap, BeatSyncDetectorState } from './types'
 
 import analyserWorklet from '@nekopaw/tempora/worklet?url'
 
 import { defineInvoke, defineInvokeHandler } from '@moeru/eventa'
 import { startAnalyser as startTemporaAnalyser } from '@nekopaw/tempora'
 
-import { isStageTamagotchi, isStageWeb, StageEnvironment } from '../../environment'
+import { isStageTamagotchi, isStageWeb, StageEnvironment } from '../environment'
 import {
   beatSyncBeatSignaledInvokeEventa,
   beatSyncGetInputByteFrequencyDataInvokeEventa,
@@ -16,8 +16,6 @@ import {
   beatSyncStateChangedInvokeEventa,
   beatSyncToggleInvokeEventa,
   beatSyncUpdateParametersInvokeEventa,
-} from '../eventa'
-import {
   createContext,
 } from './eventa'
 
@@ -260,7 +258,7 @@ export function toggleBeatSync(enabled: boolean) {
   }
 
   if (isStageTamagotchi()) {
-    const toggleFn = defineInvoke(getContext(), beatSyncToggleInvokeEventa) as (enabled: boolean) => Promise<void> // TODO: Better type
+    const toggleFn = defineInvoke(getContext(), beatSyncToggleInvokeEventa)
     return toggleFn(enabled)
   }
 
diff --git a/packages/stage-shared/src/beat-sync/eventa.ts b/packages/stage-shared/src/beat-sync/eventa.ts
index 5f6022a69..0727e1241 100644
--- a/packages/stage-shared/src/beat-sync/eventa.ts
+++ b/packages/stage-shared/src/beat-sync/eventa.ts
@@ -2,7 +2,9 @@ import type { AnalyserBeatEvent, AnalyserWorkletParameters } from '@nekopaw/temp
 
 import type { BeatSyncDetectorState } from './types'
 
-import { defineInvokeEventa } from '@moeru/eventa'
+import { createContext as createWebContext, defineInvokeEventa } from '@moeru/eventa'
+import { createContext as createBroadcastChannelContext } from '@moeru/eventa/adapters/broadcast-channel'
+import { isElectronWindow } from '@proj-airi/stage-shared'
 
 // Functions
 export const beatSyncToggleInvokeEventa = defineInvokeEventa<void, boolean>('eventa:invoke:electron:beat-sync:toggle')
@@ -13,3 +15,22 @@ export const beatSyncGetInputByteFrequencyDataInvokeEventa = defineInvokeEventa<
 // Events
 export const beatSyncStateChangedInvokeEventa = defineInvokeEventa<void, BeatSyncDetectorState>('eventa:event:electron:beat-sync:state-changed')
 export const beatSyncBeatSignaledInvokeEventa = defineInvokeEventa<void, AnalyserBeatEvent>('eventa:event:electron:beat-sync:beat-signaled')
+
+let _broadcastChannel: BroadcastChannel | undefined
+function getBroadcastChannel() {
+  if (!_broadcastChannel) {
+    _broadcastChannel = new BroadcastChannel('airi::beat-sync')
+    _broadcastChannel.onmessage = (event) => {
+    }
+  }
+  return _broadcastChannel
+}
+
+export function createContext() {
+  if (isElectronWindow(window)) {
+    return createBroadcastChannelContext(getBroadcastChannel()).context
+  }
+  else {
+    return createWebContext()
+  }
+}
diff --git a/packages/stage-shared/src/beat-sync/index.ts b/packages/stage-shared/src/beat-sync/index.ts
index 22c65a82b..2b8284f72 100644
--- a/packages/stage-shared/src/beat-sync/index.ts
+++ b/packages/stage-shared/src/beat-sync/index.ts
@@ -1,2 +1,3 @@
+export * from './detector'
 export * from './eventa'
 export * from './types'
diff --git a/packages/stage-ui/src/components/scenes/live2d/Model.vue b/packages/stage-ui/src/components/scenes/live2d/Model.vue
index 96923d22f..3813e3bc7 100644
--- a/packages/stage-ui/src/components/scenes/live2d/Model.vue
+++ b/packages/stage-ui/src/components/scenes/live2d/Model.vue
@@ -3,7 +3,7 @@ import type { Application } from '@pixi/app'
 
 import type { PixiLive2DInternalModel } from '../../../composables/live2d'
 
-import { listenBeatSyncBeatSignal } from '@proj-airi/stage-shared/beat-sync/browser'
+import { listenBeatSyncBeatSignal } from '@proj-airi/stage-shared/beat-sync'
 import { useTheme } from '@proj-airi/ui'
 import { breakpointsTailwind, until, useBreakpoints, useDebounceFn } from '@vueuse/core'
 import { formatHex } from 'culori'
diff --git a/packages/stage-ui/src/composables/use-modules-list.ts b/packages/stage-ui/src/composables/use-modules-list.ts
index 04a0f8914..9df48baca 100644
--- a/packages/stage-ui/src/composables/use-modules-list.ts
+++ b/packages/stage-ui/src/composables/use-modules-list.ts
@@ -1,6 +1,6 @@
 import type { BeatSyncDetectorState } from '@proj-airi/stage-shared/beat-sync'
 
-import { getBeatSyncState, listenBeatSyncStateChange } from '@proj-airi/stage-shared/beat-sync/browser'
+import { getBeatSyncState, listenBeatSyncStateChange } from '@proj-airi/stage-shared/beat-sync'
 import { computed, onMounted, onUnmounted, ref } from 'vue'
 import { useI18n } from 'vue-i18n'