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Download Tethertone

Version 0.2.0. Free and open source. You need both apps: one on the Mac that sends the audio, one on the phone that plays it.

For this device

macOS

macOS 14 Sonoma or later · Apple Silicon and Intel · 750 KB

Download .dmg Installer .pkg
Tethertone-0.2.0-macos.dmg
For this device

Android

Android 8.0 or later · phones and tablets · 9 MB

Download .apk All releases
QR code that opens this download page on your phone
On your computer? Scan with your phone's camera to open this page there and get the APK.
Tethertone-0.2.0-android.apk

Install on the Mac

  1. Open the .dmg and drag Tethertone into Applications. If you prefer an installer, the .pkg does the same thing and opens the app when it finishes.
  2. Open Tethertone from Applications or Spotlight.
  3. Press Start. macOS asks for one permission, depending on the capture method: Screen & System Audio Recording by default, or Microphone for BlackHole.

“Tethertone can't be opened” on first launch? The app is signed but not notarized by Apple, which requires a paid developer account. Open System Settings › Privacy & Security, scroll down and click Open Anyway. Or remove the download quarantine in Terminal:

xattr -dr com.apple.quarantine /Applications/Tethertone.app

Install on Android

  1. Download the .apk on your phone. You can also copy it over from the Mac, or install it with adb install.
  2. Open it. If Android asks, allow your browser or file manager to install apps.
  3. Open Tethertone and tap Scan pairing QR. It asks for the camera only while scanning, and for notifications so the playback notification can show.

Upgrading from AudioBridge 0.1.0? Tethertone is the same project under a new name, and it installs as a new app on both devices. Remove AudioBridge from the Mac and the phone, then pair once more.

Built Tethertone from source before? Android won't update an app signed with a different key, so uninstall that build first.

Optional: connect over USB

Wi-Fi needs nothing extra. For the lower-latency USB route:

  1. Enable USB debugging on the phone.
  2. Install adb on the Mac:
brew install android-platform-tools

Plug in the phone and accept the Allow USB debugging? prompt. Tethertone sets up adb reverse by itself and puts the cable first in the QR code.

Verify the download

Every release publishes a SHA256SUMS file. Compare it with:

shasum -a 256 Tethertone-*

The Android APK is signed with the project's release key. Its certificate SHA-256 fingerprint is:

28:F7:E2:4A:8B:5D:A7:85:4A:D5:8E:FD:F1:D5:CE:1A:C4:CB:1C:8D:CA:DE:6D:5B:11:5F:DB:41:03:C3:32:DA

Build from source

The macOS app needs only the Xcode Command Line Tools; the Android app needs JDK 17 and the Android SDK.

git clone https://github.com/AimenSayoud/tethertone.git
cd tethertone/macos && ./make-signing-identity.sh && ./build.sh --install
cd ../android && ./gradlew :androidApp:installDebug

See BUILDING.md for tests, release builds and signing.