Audiodia is a real-time sound processing application. Simply turn on your microphone and your speakers, select the desired audio filter and press Play.

Audiodia gives you access to the AudioUnit sound effects that ship with Mac OS X, such as the Reverb and the Delay effects. It also ships with a built-in pitch-shifting effect. Audiodia lets you pick favorite effects and quickly switch from one effect to another during use. The sound output is mixed with your other applications' sound output, so you can add your voice over music playing in iTunes, for instance.

It's all about having fun with real-time sound effects.
Audiodia is a real-time sound effects application. Simply turn on your microphone and your speakers, select the desired sound effect and press Play.