Installation

VoxDMR Android is published on Google Play.

1. Open the VoxDMR Play Store listing.
2. Tap Install.
3. Launch the app.

The first launch:

• Vocoder firmware downloads in the background. A banner appears on the PTT screen (“Vocoder firmware not installed”) with a tap-to-open link. Inside, status walks through Provisioning firmware… → Verifying… → Firmware ready. Like the desktop, the firmware bytes come from third-party sources and are SHA-256 verified before being written to disk.
• Microphone permission is requested the first time you press PTT.
• Battery optimization: on some devices (Xiaomi, Samsung, OnePlus, Huawei) Android may aggressively kill the app in the background. Open Settings → Background in the app to grant Ignore battery optimizations and, where exposed, Autostart.

PoC radios and 32-bit devices

Many PoC (push-to-talk over cellular) radios don’t ship with the Google Play Store, and most run an older 32-bit build of Android that the Play release can’t install. For these, VoxDMR also publishes a standalone APK on GitHub Releases.

If you’re installing on a PoC radio (or any 32-bit Android device), sideload the non-Play-Store build:

1. On the radio, open the latest release page.
2. Download the 32-bit (armeabi-v7a) APK. Most PoC radios are 32-bit, so if you’re unsure, pick this one — the 64-bit (arm64-v8a) build will not install on a 32-bit device.
3. When Android prompts, allow installs from your browser or file manager (Settings → Apps → Special access → Install unknown apps).
4. Open the downloaded APK and tap Install, then launch the app.

First launch (firmware, microphone, battery optimization) works exactly as it does for the Play Store install above.

Where Android stores things

App data lives in the standard Android app-private directory. Uninstalling the app removes config, firmware, and logs.

VoxDMR Desktop ships as a single self-contained binary. No installer, no package manager, no system services. Download, verify, run.

Platform requirements

• Linux: ALSA support (libasound2 on Debian/Ubuntu/Mint; alsa-lib on Arch; built into most distros).
• Windows: Windows 10 1809 or later (x64). All other dependencies are statically linked.

Linux (x86_64)

# Download
curl -LO https://github.com/jcalado/voxdmr-site/releases/latest/download/VoxDMR-linux-x86_64
curl -LO https://github.com/jcalado/voxdmr-site/releases/latest/download/SHA256SUMS

# Verify
sha256sum -c SHA256SUMS --ignore-missing

# Run
chmod +x VoxDMR-linux-x86_64
./VoxDMR-linux-x86_64

Windows (x86_64)

1. Open the latest release page.
2. Download VoxDMR-windows-x86_64.exe.
3. Optional but recommended: also download SHA256SUMS and verify in PowerShell:

   $expected = (Get-Content SHA256SUMS | Select-String 'VoxDMR-windows-x86_64.exe').ToString().Split(' ')[0]
   $actual = (Get-FileHash .\VoxDMR-windows-x86_64.exe -Algorithm SHA256).Hash.ToLower()
   if ($expected -eq $actual) { "OK" } else { "MISMATCH" }

4. Double-click VoxDMR-windows-x86_64.exe to launch.

The first time you run it, Windows SmartScreen may warn you the app is from an “unknown publisher”. VoxDMR isn’t code-signed yet. Click More info → Run anyway to continue.

First-launch firmware setup

The first time VoxDMR Desktop starts, it shows a one-shot setup card because the AMBE+2 vocoder needs the MD-380 firmware to encode and decode audio. The firmware is not bundled with the binary: for legal reasons, VoxDMR fetches it directly from third-party sources to your machine and never proxies the bytes through us.

You have two choices:

Auto-download (recommended). Click Download (≈2 MB). VoxDMR fetches:

• D002.032.bin (994 KB) from md380.org, unwrapped from the OEM update format.
• d02032-core.img (128 KB) from the upstream md380_vocoder_dynarmic project on GitHub.

Both downloads are SHA-256 verified before being written to disk. The whole thing takes a few seconds on a normal connection.

Choose existing files: if your machine can’t reach the download URLs (corporate proxy, offline, restricted firewall), click Choose existing files… and pick D002.032.bin and d02032-core.img from somewhere on disk. They’re copied into the data directory and SHA-verified the same way.

Once setup completes, the main UI mounts and the firmware is loaded for every subsequent launch.

Where VoxDMR Desktop stores things

VoxDMR follows OS conventions for config, data, and logs:

¹ macOS isn’t currently a release target. Paths are listed for future reference.

To override the firmware location (e.g. for packagers or sandboxed installs), set VOXDMR_FIRMWARE_DIR before launching:

VOXDMR_FIRMWARE_DIR=/opt/voxdmr/firmware ./VoxDMR-linux-x86_64

The app also looks for <exe-dir>/firmware/. Drop the firmware files next to the binary for fully portable installs (USB stick, archived bundle, etc.).

Updating

Recent desktop builds include an in-app auto-update — on launch (and from Settings → About → Check for updates), VoxDMR offers to download and atomically swap in the new build for you, SHA-verified end-to-end. You can also still upgrade manually: download the new binary from the releases page, replace the old binary, and launch. Config, talkgroup favorites, profiles, aliases, and firmware are preserved across updates.

Uninstall

VoxDMR Desktop is a single binary with no installer. Delete the binary to remove the app. To also remove your config, firmware, and logs, delete the three directories listed above.