programs
input / output
	oss ?		esd ?		arts ?	jack ?	gstreamer ?	alsa ?
	|		|		|	|	|	|
	|		|		|	|	gstreamer	|
	|		|		|	|		|
	|		|		|	|	|	|
	|	aoss	esound		arts	jack	|	|
	|	alsa-oss	libesd0	libesd-alsa0			|	|
	|	|	(/dev/dsp)	|	|	|	|	|
	|	|		|	|	|	|	|
/dev/dsp..		hw:0 / default / plughw:.. or: dmix
		/dev/snd/pcmC0D0p etc.
oss	snd_pcm_oss	alsa
	alsa
hardware

Jasper, dec 2007.