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termixer

A terminal-based DJ mixer for live performance with TidalCycles. Built in Rust with ratatui, it provides real-time EQ, filtering, crossfading, and sample pads for mixing audio from MPV and SuperCollider.

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Features

Dual-deck mixer A-B channel faders, pan, 3-band EQ, LPF/HPF
Crossfader mix different decks, cue-in Deck C with unique output (headphone/booth)
Microphone input selectable device, gain, and mute toggle
Sample pads 4x4 grid with sequencer, save/load configs
SuperCollider integration custom SynthDefs for processing SuperCollider output
Vim navigation hjkl throughout, multi-modal nav system

Prerequisites

Rust cargo package manager and Rust language compiler
Nerd Fonts required for icons (rewind, fast-forward, etc.)
MPV media playback with IPC socket support
SuperCollider (optional) for TidalCycles integration

Installation

From crates.io

cargo install termixer

From GitHub release archive

This will take the latest release binary and install it to ~/.cargo/bin/termixer (same as cargo).

curl -sL https://raw.githubusercontent.com/l00sed/termixer/master/install.sh | bash

From source

git clone https://github.com/l00sed/termixer.git
cd termixer
cargo install --path .

Build

cargo build              # debug
cargo build --release    # optimized with LTO

Usage

# Auto-discover audio sources
cargo run

# Specify MPV sources explicitly
cargo run -- -s "Deck A" /tmp/mpv-a.sock -s "Deck B" /tmp/mpv-b.sock

# With music and samples directories
cargo run -- -m ~/Music -S ~/Samples

Starting MPV with IPC

mpv --input-ipc-server=/tmp/mpv-music.sock music.mp3

There's also an mpv wrapper script included that you can use to automatically enable the necessary flags just by setting the TM environment variable:

TM=1 mpv music.mp3

Termixer should automatically install this wrapper script to ~/.local/bin/mpv. When TM=1, it will add the socket and pcm flags. Without it, mpv runs normally.

To manage your own mpv config and disable automatic seeding of ~/.config/mpv/scripts/ and ~/.config/mpv/mpv.conf, use export TM_NO_CONFIG=1 in your shell profile.

Pads/Samples/Sequences

NOTE: Termixer uses the default SuperDirt samples installation directory by default. It's a great, free library to grab some starter samples.

macOS — ~/Library/Application Support/SuperCollider/downloaded-quarks/Dirt-Samples

Linux — ~/.local/share/SuperCollider/downloaded-quarks/Dirt-Samples

Pad and sequence configurations can be exported to .json files and imported later to restore all saved samples, pad settings, and sequences. The default save/load directory is ~/Documents.

  • Change the sample directory with termixer -S PATH.
  • Change the sequences/samples ("sessions") directory with termixer -L PATH.

CLI Options

Flag Description
-s, --source NAME SOCKET Add an audio source (MPV IPC socket)
-m, --music-dir PATH Directory for audio file browser
-S, --samples-dir PATH Directory for sample pad files
-L, --session-dir PATH Directory for session save/load (default: ~/Documents)
-d, --discover Auto-discover audio sources (default)
-h, --help Show help

Keyboard Controls

Navigation

Key Action
Tab / h / l Switch between panes (Deck A, DJ, Deck B, Master)
Enter Enter control select mode
Esc Go back one level
? Toggle help overlay
q Quit

Controls

Key Action
j / k Navigate controls up/down
h / l Adjust value / toggle EQ kill switch
J / K Coarse adjustment (0.2)
+ / - Fine adjustment (0.05)
m / s Toggle mute / solo
c Center pan or crossfader
0 Reset control to default

Source & Sample Pads

Key Action
A Open source picker for Deck A
B Open source picker for Deck B
P Toggle sample pads mode

Development

Check changes and run the test suite before opening a pull request:

cargo check
cargo test
cargo clippy -- -D warnings

Run Termixer with DEBUG=1 while developing behavior, state synchronization, or audio routing:

DEBUG=1 cargo run

Debug mode enables the in-app debug pane and preserves diagnostic logging that is otherwise redirected to prevent stderr from corrupting the TUI. Clippy is run with warnings treated as errors to keep new code lint-clean.

License

MIT

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A 2-deck mixer, sample pads, sequencer— all from any Unix terminal.

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