macOS Volume Controller

A command-line tool for controlling system audio volume on macOS, written in Swift.

Features

• Reset volumes to default values (output: 56%, input: 50%)
• Set custom volume levels for both output and input
• Control output or input volume independently
• Works without requiring sudo or special permissions

Installation

1. Clone or download this repository
2. Compile the tool:

   make

Usage

Reset to Default Volumes

Reset output volume to 56% and input volume to 50%:

./volume_controller reset

Set Custom Volumes

Set both output and input volumes:

./volume_controller set <output> <input>

# Example: Set output to 70% and input to 60%
./volume_controller set 70 60

Control Output Volume Only

./volume_controller output <value>

# Example: Set output to 80%
./volume_controller output 80

Control Input Volume Only

./volume_controller input <value>

# Example: Set input to 40%
./volume_controller input 40

Show Help

./volume_controller help

Technical Details

• Output Volume: Uses Core Audio API for precise control
• Input Volume: Uses AppleScript for reliable control across macOS versions
• Input Volume Rounding: macOS rounds input volume to specific increments (e.g., 50% may become 53%)

Files

• volume_controller.swift - Main source code
• volume_controller - Compiled executable
• set_input_volume.swift - Original input-only version
• Makefile - Build configuration

Requirements

• macOS
• Swift compiler (comes with Xcode or Command Line Tools)

Building from Source

# Using make
make

# Or compile directly
swiftc volume_controller.swift -o volume_controller

# Clean build files
make clean

License

This project is provided as-is for personal use.