TotalMixer for Linux

GUI mixer application for RME Fireface audio interfaces on Linux.

Supported Hardware

• RME Fireface 400

Features

• Mixer view - canonical TotalMix-style 3-row layout (hardware inputs, software playback, hardware outputs). Selecting an output edits its submix.
• Matrix view - full crosspoint grid, kept in sync with the mixer view.
• Level meters - hardware metering with a -90 dBFS range, RMS bar plus peak-hold line, and overload indication.
• Per-channel Mute / Solo / stereo Link on outputs, and per-submix Mute on input/playback sources.
• OSC remote control - bidirectional Open Sound Control endpoint to drive and observe the mixer over the network (see Usage).

Dependencies

System Libraries

• ALSA (libasound)
• X11 and extensions (libx11, libxrandr, libxinerama, libxcursor, libxi)
• OpenGL
• libsystemd
• liblo (OSC)

Runtime Dependency

Required: snd-firewire-ctl-services

This project requires snd-fireface-ctl-service to manage ALSA controls for the Fireface hardware. The service must be running before launching the GUI.

Installation

Arch Linux (AUR)

Binary Package (Recommended)

yay -S linux-fireface-mixer-bin

Source Package

yay -S linux-fireface-mixer

Manual Build

1. Install System Dependencies

Arch Linux

sudo pacman -S alsa-lib libx11 libxrandr libxinerama libxcursor libxi systemd liblo

Ubuntu/Debian

sudo apt install libasound2-dev libx11-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libsystemd-dev liblo-dev

2. Install snd-firewire-ctl-services

Follow the installation instructions at: https://github.com/alsa-project/snd-firewire-ctl-services

After installation, enable and start the service:

systemctl --user enable snd-fireface-ctl.service
systemctl --user start snd-fireface-ctl.service

Verify the service is running:

systemctl --user status snd-fireface-ctl.service

3. Build TotalMixer

mkdir build
cd build
cmake ..
make

Usage

./build/totalmixer_gui

The GUI will display an error if snd-fireface-ctl.service is not running.

OSC Remote Control

Enable the OSC server under Control tab -> [ OSC Remote ] (default: receive on UDP 7001, send feedback on 9001). Values are normalized floats in 0.0 .. 1.0; toggles use 0/1.

Address namespace (receive and send are symmetric):

Address	Meaning
/out/fader/N /out/mute/N /out/solo/N /out/link/N	Output N fader / mute / solo / stereo link
/in/fader/N /in/mute/N	Input N source gain / mute in the current submix
/pb/fader/N /pb/mute/N	Playback N source gain / mute in the current submix
/submix/select/N (recv)	Switch the submix being edited
/submix/current (send)	Currently active submix number
/query (recv)	Request a full state dump

The desktop sends feedback to the first host that contacts it, so a controller should send any message (e.g. /query) once to register. Quick test with the liblo CLI tools:

oscsend 127.0.0.1 7001 /out/fader/1 f 0.5   # set output 1 fader to mid
oscdump 9001                                 # observe feedback from the desktop

Note: the endpoint binds all interfaces and is unauthenticated UDP. Use it only on a trusted LAN.

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.