% uname -a
FreeBSD sohaam.webstream 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #10 r273269: Sun Oct 19 11:12:51 NOVT 2014     sohaam@sohaam.webstream:/usr/obj/usr/src/sys/CORE  amd64

*************************************************************************
% cat /dev/sndstat
Installed devices:
pcm0: <VIA VT1708S_0 (Analog 7.1+HP/2.0)> (play/rec) default
pcm1: <VIA VT1708S_0 (Digital)> (play)
pcm2: <VIA VT1708S_0 (Rear-panel Digital)> (play)
pcm3: <NVIDIA (0x0012) (HDMI/DP 8ch)> (play)
pcm4: <NVIDIA (0x0012) (HDMI/DP 8ch)> (play)
pcm5: <NVIDIA (0x0012) (HDMI/DP 8ch)> (play)
pcm6: <NVIDIA (0x0012) (HDMI/DP 8ch)> (play)
pcm7: <Creative SB0880 X-Fi (Analog 7.1+HP/2.0)> (play/rec)
pcm8: <Creative SB0880 X-Fi (Rear Digital)> (play/rec)
pcm9: <Creative SB0880 X-Fi (Front Analog Mic)> (rec)

*************************************************************************
% mixer -f /dev/mixer7
Mixer vol      is currently set to  81:81
Mixer pcm      is currently set to 100:100
Mixer line     is currently set to  90:90
Mixer rec      is currently set to  90:90
Recording source: line


*************************************************************************
% sysctl hw.snd
hw.snd.feeder_rate_presets: 100:8:0.85 100:36:0.92 100:164:0.97
hw.snd.feeder_rate_polyphase_max: 183040
hw.snd.feeder_rate_min: 1
hw.snd.feeder_rate_max: 2016000
hw.snd.feeder_rate_round: 25
hw.snd.feeder_rate_quality: 4
hw.snd.feeder_eq_presets: PEQ:16000,0,2500,62,0,2500:-9,9,1,0:44100,48000,88200,96000,176400,192000
hw.snd.feeder_eq_exact_rate: 0
hw.snd.report_soft_formats: 1
hw.snd.report_soft_matrix: 1
hw.snd.latency: 5
hw.snd.latency_profile: 1
hw.snd.vpc_autoreset: 1
hw.snd.vpc_0db: 45
hw.snd.vpc_reset: 0
hw.snd.compat_linux_mmap: 0
hw.snd.vpc_mixer_bypass: 1
hw.snd.verbose: 0
hw.snd.default_auto: 0
hw.snd.version: 2009061500/amd64
hw.snd.default_unit: 0
hw.snd.maxautovchans: 16

*************************************************************************
% sysctl dev.pcm
dev.pcm.%parent: 
dev.pcm.0.%desc: VIA VT1708S_0 (Analog 7.1+HP/2.0)
dev.pcm.0.%driver: pcm
dev.pcm.0.%location: nid=28,34,25,35,29,26,30,27
dev.pcm.0.%pnpinfo: 
dev.pcm.0.%parent: hdaa0
dev.pcm.0.play.vchans: 14
dev.pcm.0.play.vchanmode: passthrough
dev.pcm.0.play.vchanrate: 48000
dev.pcm.0.play.vchanformat: s16le:5.1
dev.pcm.0.play.32bit: 24
dev.pcm.0.rec.vchans: 1
dev.pcm.0.rec.vchanmode: fixed
dev.pcm.0.rec.vchanrate: 48000
dev.pcm.0.rec.vchanformat: s16le:2.0
dev.pcm.0.rec.32bit: 24
dev.pcm.0.rec.autosrc: 2
dev.pcm.0.buffersize: 65536
dev.pcm.0.bitperfect: 0
dev.pcm.1.%desc: VIA VT1708S_0 (Digital)
dev.pcm.1.%driver: pcm
dev.pcm.1.%location: nid=32
dev.pcm.1.%pnpinfo: 
dev.pcm.1.%parent: hdaa0
dev.pcm.1.play.vchans: 1
dev.pcm.1.play.vchanmode: passthrough
dev.pcm.1.play.vchanrate: 48000
dev.pcm.1.play.vchanformat: s16le:2.0
dev.pcm.1.play.32bit: 24
dev.pcm.1.buffersize: 65536
dev.pcm.1.bitperfect: 0
dev.pcm.2.%desc: VIA VT1708S_0 (Rear-panel Digital)
dev.pcm.2.%driver: pcm
dev.pcm.2.%location: nid=33
dev.pcm.2.%pnpinfo: 
dev.pcm.2.%parent: hdaa0
dev.pcm.2.play.vchans: 1
dev.pcm.2.play.vchanmode: passthrough
dev.pcm.2.play.vchanrate: 48000
dev.pcm.2.play.vchanformat: s16le:2.0
dev.pcm.2.play.32bit: 24
dev.pcm.2.buffersize: 65536
dev.pcm.2.bitperfect: 0
dev.pcm.3.%desc: NVIDIA (0x0012) (HDMI/DP 8ch)
dev.pcm.3.%driver: pcm
dev.pcm.3.%location: nid=5
dev.pcm.3.%pnpinfo: 
dev.pcm.3.%parent: hdaa1
dev.pcm.3.play.vchans: 1
dev.pcm.3.play.vchanmode: passthrough
dev.pcm.3.play.vchanrate: 48000
dev.pcm.3.play.vchanformat: s16le:2.0
dev.pcm.3.play.32bit: 24
dev.pcm.3.buffersize: 65536
dev.pcm.3.bitperfect: 0
dev.pcm.4.%desc: NVIDIA (0x0012) (HDMI/DP 8ch)
dev.pcm.4.%driver: pcm
dev.pcm.4.%location: nid=5
dev.pcm.4.%pnpinfo: 
dev.pcm.4.%parent: hdaa2
dev.pcm.4.play.vchans: 0
dev.pcm.4.play.32bit: 24
dev.pcm.4.buffersize: 65536
dev.pcm.4.bitperfect: 1
dev.pcm.5.%desc: NVIDIA (0x0012) (HDMI/DP 8ch)
dev.pcm.5.%driver: pcm
dev.pcm.5.%location: nid=5
dev.pcm.5.%pnpinfo: 
dev.pcm.5.%parent: hdaa3
dev.pcm.5.play.vchans: 1
dev.pcm.5.play.vchanmode: passthrough
dev.pcm.5.play.vchanrate: 48000
dev.pcm.5.play.vchanformat: s16le:2.0
dev.pcm.5.play.32bit: 24
dev.pcm.5.buffersize: 65536
dev.pcm.5.bitperfect: 0
dev.pcm.6.%desc: NVIDIA (0x0012) (HDMI/DP 8ch)
dev.pcm.6.%driver: pcm
dev.pcm.6.%location: nid=5
dev.pcm.6.%pnpinfo: 
dev.pcm.6.%parent: hdaa4
dev.pcm.6.play.vchans: 1
dev.pcm.6.play.vchanmode: passthrough
dev.pcm.6.play.vchanrate: 48000
dev.pcm.6.play.vchanformat: s16le:2.0
dev.pcm.6.play.32bit: 24
dev.pcm.6.buffersize: 65536
dev.pcm.6.bitperfect: 0
dev.pcm.7.%desc: Creative SB0880 X-Fi (Analog 7.1+HP/2.0)
dev.pcm.7.%driver: pcm
dev.pcm.7.%location: nid=13,14,15,16,17,19
dev.pcm.7.%pnpinfo: 
dev.pcm.7.%parent: hdaa5
dev.pcm.7.play.vchans: 1
dev.pcm.7.play.vchanmode: fixed
dev.pcm.7.play.vchanrate: 48000
dev.pcm.7.play.vchanformat: s16le:2.0
dev.pcm.7.play.32bit: 24
dev.pcm.7.rec.vchans: 1
dev.pcm.7.rec.vchanmode: fixed
dev.pcm.7.rec.vchanrate: 48000
dev.pcm.7.rec.vchanformat: s16le:2.0
dev.pcm.7.rec.32bit: 24
dev.pcm.7.rec.autosrc: 2
dev.pcm.7.buffersize: 65536
dev.pcm.7.bitperfect: 0
dev.pcm.8.%desc: Creative SB0880 X-Fi (Rear Digital)
dev.pcm.8.%driver: pcm
dev.pcm.8.%location: nid=18,23
dev.pcm.8.%pnpinfo: 
dev.pcm.8.%parent: hdaa5
dev.pcm.8.play.vchans: 1
dev.pcm.8.play.vchanmode: passthrough
dev.pcm.8.play.vchanrate: 48000
dev.pcm.8.play.vchanformat: s16le:2.0
dev.pcm.8.play.32bit: 24
dev.pcm.8.rec.vchans: 1
dev.pcm.8.rec.vchanmode: passthrough
dev.pcm.8.rec.vchanrate: 48000
dev.pcm.8.rec.vchanformat: s16le:2.0
dev.pcm.8.rec.32bit: 24
dev.pcm.8.rec.autosrc: 2
dev.pcm.8.buffersize: 65536
dev.pcm.8.bitperfect: 0
dev.pcm.9.%desc: Creative SB0880 X-Fi (Front Analog Mic)
dev.pcm.9.%driver: pcm
dev.pcm.9.%location: nid=20
dev.pcm.9.%pnpinfo: 
dev.pcm.9.%parent: hdaa5
dev.pcm.9.rec.vchans: 1
dev.pcm.9.rec.vchanmode: fixed
dev.pcm.9.rec.vchanrate: 48000
dev.pcm.9.rec.vchanformat: s16le:2.0
dev.pcm.9.rec.32bit: 24
dev.pcm.9.rec.autosrc: 2
dev.pcm.9.buffersize: 65536
dev.pcm.9.bitperfect: 0


*************************************************************************
% dmesg | grep 'pcm[0-9]'
pcm0: <VIA VT1708S_0 (Analog 7.1+HP/2.0)> at nid 28,34,25,35,29 and 26,30,27 on hdaa0
pcm1: <VIA VT1708S_0 (Digital)> at nid 32 on hdaa0
pcm2: <VIA VT1708S_0 (Rear-panel Digital)> at nid 33 on hdaa0
pcm3: <NVIDIA (0x0012) (HDMI/DP 8ch)> at nid 5 on hdaa1
pcm4: <NVIDIA (0x0012) (HDMI/DP 8ch)> at nid 5 on hdaa2
pcm5: <NVIDIA (0x0012) (HDMI/DP 8ch)> at nid 5 on hdaa3
pcm6: <NVIDIA (0x0012) (HDMI/DP 8ch)> at nid 5 on hdaa4
pcm7: <Creative SB0880 X-Fi (Analog 7.1+HP/2.0)> at nid 13,14,15,16,17 and 19 on hdaa5
pcm8: <Creative SB0880 X-Fi (Rear Digital)> at nid 18 and 23 on hdaa5
pcm9: <Creative SB0880 X-Fi (Front Analog Mic)> at nid 20 on hdaa5