bash-clap

a pure bash script to detect hand claps

Installation

Linux (Debian, Ubuntu, Raspbian, ...)

apt-get install sox git

macOS (homebrew required)

brew install sox

Then

git clone https://github.com/daweedm/bash-clap && cd bash-clap && chmod +x bash-clap.sh

Configuration

What audio source to use ? ref.

Linux (Debian, Ubuntu, Raspbian, ...)

First, install alsa-utils :

apt-get install alsa-utils

Then list all available devices :

arecord --list-devices

You get an output similar to this

**** List of CAPTURE Hardware Devices ****
card X: (...), device Y: (..)
Subdevices: 1/1
Subdevice #0: subdevice #0
(...)

You might have more than one audio interface (integrated audio card, USB-wired mic, ...). Once you have chosen the interface you want to use, you can guess your audio source from the numbers X and Y : src="alsa hw:X,Y"

Open bash-clap.sh and change the src variable to your audio source if it differs from the default one.

macOS

Nothing to do ! You can leave src value to "auto"

Action

When a clap is detected, the on_clap() function is executed. You can customize its behavior in the bash-clap.sh file.

Notes

You can use the screen for Linux tool to keep the process listening for claps in the background