There are already several way to use push buttons in your projects (e.g. hacking mouse and keyboard, or Arduino, gainer, MCK). This probides alternative way to use push buttons with audio input and output.
We also present an application of this instructable from a work Monalisa "shadow of the sound".
All you need is just a push button, some soldering, and some software.
Note: This is a series of "How to coonect with Audio". Please see others: Fader, and Sensor.
Step 1: The Parts
1 Push button
In this time, we choose a button with push on / off locking switch. However you could choose a push button with no lock, toggle switch, or foot switch instead.
2 3.5mm Mono Plug
One for audio input and another for audio output.
1 Twin Cable
You could use loudspeaker cable for this purpose. The length depends on how long you want.