🎤 mcgain

A simple command-line tool to control audio device volume levels on macOS.

NOTE This is my first project written in Zig. While I'm learning the language and trying to follow best practices, there might be some non-idiomatic code.

✨ Features

• List available audio devices
• Get volume levels for input/output channels
• Set volume levels for input/output channels
• Support for both scalar (0-1) and decibel values

Prerequisites

• macOS (uses CoreAudio)
• Zig 0.13.0 or later

Installation

git clone https://github.com/wnkz/mcgain.git
cd mcgain
zig build

The binary will be available at zig-out/bin/mcgain

🚀 Usage

List available devices

mcgain ls

Get volume levels

mcgain get-levels              # Show volume levels in scalar (0-1)
mcgain get-levels -d           # Show volume levels in decibels
mcgain get-levels -n           # Show device names

Set volume levels

mcgain set-levels <device_id> <in|out> <value>      # Set volume using scalar (0-1)
mcgain set-levels -d <device_id> <in|out> <value>   # Set volume using decibels
mcgain set-levels -n "Device Name" <in|out> <value> # Set volume by device name

Building from source

zig build        # Build the project
zig build run    # Build and run

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Acknowledgments

• Written in Zig
• Uses macOS CoreAudio Framework