Les pépites #soft #system #en #interface #audio

[en] Soundflower is a Mac OS X (10.2 and later) system extension that allows applications to pass audio to other applications.

[en] a Jack implementation for Mac OS X

[en] SoundSource is a tiny tool for OS X enabling you to switch your audio input and output sources with a single click. And with the System setting, you can transfer system beeps to a secondary audio source so you won't be disturbed.