What it does
A simple bash script that smoothly fades audio volume up or down using ALSA’s amixer. Useful for media installations, alarm clocks, or any scenario where you want gradual volume transitions instead of abrupt changes.
Key features
- Smooth fading — gradual volume transitions with configurable step size and duration
- Fade in/out — supports both directions
- ALSA native — works directly with ALSA mixer controls, no PulseAudio required
- Lightweight — pure bash, no dependencies beyond
amixer
Usage
# Fade to 80% over 5 seconds
alsamixer-fader 80 5
# Fade to 0% (mute) over 10 seconds
alsamixer-fader 0 10Commonly used in museum installations for smooth audio transitions between exhibition states.