FreeBSD Audio Driver (64bit 2009061500/amd64)
Installed devices:
pcm0: <Realtek ALC256 (Internal Analog)> on hdaa0  (1p:1v/1r:1v) default
	snddev flags=0x2e2<AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC>
	[pcm0:play:dsp0.p0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000004
	interrupts 0, underruns 0, feed 0, ready 0 [b:4096/2048/2|bs:4096/2048/2]
	channel flags=0x2100<BUSY,HAS_VCHAN>
	{userland} -> feeder_mixer(0x00200010) -> {hardware}
	pcm0:play:dsp0.p0[pcm0:virtual:dsp0.vp0]: spd 8000, fmt 0x00100008, flags 0x10000000, 0x00000000
	interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:0/0/0]
	channel flags=0x10000000<VIRTUAL>
	{userland} -> feeder_root(0x00000000) -> {hardware}
	[pcm0:record:dsp0.r0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000005
	interrupts 0, overruns 0, feed 0, hfree 4096, sfree 4096 [b:4096/2048/2|bs:4096/2048/2]
	channel flags=0x2100<BUSY,HAS_VCHAN>
	{hardware} -> feeder_root(0x00200010) -> feeder_mixer(0x00200010) -> {userland}
	pcm0:record:dsp0.r0[pcm0:virtual:dsp0.vr0]: spd 8000, fmt 0x00100008, flags 0x10000000, 0x00000000
	interrupts 0, overruns 0, feed 0, hfree 0, sfree 0 [b:0/0/0|bs:0/0/0]
	channel flags=0x10000000<VIRTUAL>
	{hardware} -> feeder_root(0x00000000) -> {userland}
pcm1: <Realtek ALC256 (Front Analog Headphones)> on hdaa0  (1p:1v/0r:0v)
	snddev flags=0x2e3<SIMPLEX,AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC>
	[pcm1:play:dsp1.p0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000004
	interrupts 0, underruns 0, feed 0, ready 0 [b:4096/2048/2|bs:4096/2048/2]
	channel flags=0x2100<BUSY,HAS_VCHAN>
	{userland} -> feeder_mixer(0x00200010) -> {hardware}
	pcm1:play:dsp1.p0[pcm1:virtual:dsp1.vp0]: spd 8000, fmt 0x00100008, flags 0x10000000, 0x00000000
	interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:0/0/0]
	channel flags=0x10000000<VIRTUAL>
	{userland} -> feeder_root(0x00000000) -> {hardware}
pcm2: <Intel Kabylake (HDMI/DP 8ch)> on hdaa1  (1p:1v/0r:0v)
	snddev flags=0x2e7<SIMPLEX,AUTOVCHAN,SOFTPCMVOL,BUSY,MPSAFE,REGISTERED,VPC>
	[pcm2:play:dsp2.p0]: spd 48000, fmt 0x00200010, flags 0x00006100, 0x00000004
	interrupts 0, underruns 0, feed 0, ready 0 [b:4096/2048/2|bs:4096/2048/2]
	channel flags=0x6100<BUSY,HAS_VCHAN,VCHAN_PASSTHROUGH>
	{userland} -> feeder_mixer(0x00200010) -> {hardware}
	pcm2:play:dsp2.p0[pcm2:virtual:dsp2.vp0]: spd 8000, fmt 0x00100008, flags 0x10000000, 0x00000000
	interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:0/0/0]
	channel flags=0x10000000<VIRTUAL>
	{userland} -> feeder_root(0x00000000) -> {hardware}
No devices installed from userspace.