FreeBSD Audio Driver (64bit 2009061500/amd64)
Installed devices:
pcm0: <Intel Haswell (HDMI/DP 8ch)> on hdaa0  (1p:1v/0r:0v) default
        snddev flags=0x2e7<SIMPLEX,AUTOVCHAN,SOFTPCMVOL,BUSY,MPSAFE,REGISTERED,VPC>
        [pcm0:play:dsp0.p0]: spd 48000, fmt 0x00200010, flags 0x00006100, 0x00000004
        interrupts 618, underruns 0, feed 618, ready 0 [b:4096/2048/2|bs:4096/2048/2]
        channel flags=0x6100<BUSY,HAS_VCHAN,VCHAN_PASSTHROUGH>
        {userland} -> feeder_mixer(0x00200010) -> {hardware}
        pcm0:play:dsp0.p0[pcm0:virtual:dsp0.vp0]: spd 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {userland} -> feeder_root(0x00200010) -> feeder_volume(0x00200010) -> feeder_rate(0x00200010 q:1 44100 -> 48000) -> {hardware}
pcm1: <Realtek (0x0900) (Rear Analog 5.1/2.0)> on hdaa1  (1p:1v/1r:1v)
        snddev flags=0x2e2<AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC>
        [pcm1:play:dsp1.p0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000004
        interrupts 482, underruns 0, feed 482, 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 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {userland} -> feeder_root(0x00200010) -> feeder_volume(0x00200010) -> feeder_rate(0x00200010 q:1 44100 -> 48000) -> {hardware}
        [pcm1:record:dsp1.r0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000005
        interrupts 789, overruns 0, feed 1578, 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}
        pcm1:record:dsp1.r0[pcm1:virtual:dsp1.vr0]: spd 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, overruns 0, feed 0, hfree 0, sfree 65536 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {hardware} -> feeder_root(0x00200010) -> feeder_rate(0x00200010 q:1 48000 -> 44100) -> feeder_volume(0x00200010) -> {userland}
pcm2: <Realtek (0x0900) (Front Analog)> on hdaa1  (1p:1v/1r:1v)
        snddev flags=0x2e2<AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC>
        [pcm2:play:dsp2.p0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000004
        interrupts 680, underruns 0, feed 680, ready 0 [b:4096/2048/2|bs:4096/2048/2]
        channel flags=0x2100<BUSY,HAS_VCHAN>
        {userland} -> feeder_mixer(0x00200010) -> {hardware}
        pcm2:play:dsp2.p0[pcm2:virtual:dsp2.vp0]: spd 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {userland} -> feeder_root(0x00200010) -> feeder_volume(0x00200010) -> feeder_rate(0x00200010 q:1 44100 -> 48000) -> {hardware}
        [pcm2:record:dsp2.r0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000005
        interrupts 787, overruns 0, feed 1574, 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}
        pcm2:record:dsp2.r0[pcm2:virtual:dsp2.vr0]: spd 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, overruns 0, feed 0, hfree 0, sfree 65536 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {hardware} -> feeder_root(0x00200010) -> feeder_rate(0x00200010 q:1 48000 -> 44100) -> feeder_volume(0x00200010) -> {userland}
pcm3: <Realtek (0x0900) (Rear Digital)> on hdaa1  (1p:1v/0r:0v)
        snddev flags=0x2e7<SIMPLEX,AUTOVCHAN,SOFTPCMVOL,BUSY,MPSAFE,REGISTERED,VPC>
        [pcm3:play:dsp3.p0]: spd 48000, fmt 0x00200010, flags 0x00006100, 0x00000004
        interrupts 835, underruns 0, feed 835, ready 0 [b:4096/2048/2|bs:4096/2048/2]
        channel flags=0x6100<BUSY,HAS_VCHAN,VCHAN_PASSTHROUGH>
        {userland} -> feeder_mixer(0x00200010) -> {hardware}
        pcm3:play:dsp3.p0[pcm3:virtual:dsp3.vp0]: spd 44100/48000, fmt 0x00200010, flags 0x10000000, 0x00000029
        interrupts 0, underruns 0, feed 0, ready 0 [b:0/0/0|bs:65536/2048/32]
        channel flags=0x10000000<VIRTUAL>
        {userland} -> feeder_root(0x00200010) -> feeder_volume(0x00200010) -> feeder_rate(0x00200010 q:1 44100 -> 48000) -> {hardware}