Apple Soundbus support

modulename: snd-aoa-soundbus.ko

configname: CONFIG_SND_AOA_SOUNDBUS

Linux Kernel Configuration
└─>Device Drivers
└─>Sound
└─>Advanced Linux Sound Architecture
└─>Apple Onboard Audio driver
└─>Apple Soundbus support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables the generic driver for the soundbus
support on Apple machines.

It is required for the sound bus implementations.

source code:
sound/aoa/soundbus/
selects
CONFIG_SND_PCM