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Bosun

Configure MIDI Captain pedals from your phone
Bosun is the Android companion for the PaintAudio MIDI Captain (10-switch, and experimentally the 6-switch Mini 6) running the open-source Bosun firmware. Configure the pedal from your phone and use Stage at a gig.

Features:
- Configure footswitches, banks, rigs, LEDs and expression pedals, then save them to the pedal
- Profiles for Kemper Player, Head, Rack and Stage, plus Generic MIDI
- Stage shows the current rig, bank, effect states, a tuner and Morph controls
- Connect directly over USB-OTG, or through a Raspberry Pi hub on the local network or its Wi-Fi hotspot
- Android can route MIDI between the Captain and a USB Kemper
- No account required; the pedal connection works without internet access

Requires a MIDI Captain running Bosun firmware, installed with Bosun Desktop. Kemper support is experimental: Head, Rack and Stage have not yet been validated on hardware.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 0.8.4 (45) suggested Added on Oct 16, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 10 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "connectedDevice"
      Allows the app to make use of foreground services with the type "connectedDevice"
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • com.bosun.app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 18 MiB PGP Signature | Build Log

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