Sound Card Configuration

["John Beavers" <john@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Hello,

 

I have a soundblaster Live that I am trying to have the outputs used as independant virtual devices.  Basically, there are two X sessions running with two users logged into them (this is called multiseating).  I've heard of assigning different sound cards to the different X sessions, but I've also heard of using a single card in different than expected ways with alsa.  I was just wondering if this is possible with my card and alsa, and if so, how.  I don't know if I'm using the right terminology or not, but I want to make a virtual device that will be the default device for the second instance of X (and therefore the other user logged in), therefore I will have two separate and independant devices outputing sound into headphones.  Below is some info you might find useful.  Let me know if you need other info.

 

John

 

 

lspci
00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 01)
00:01.0 PCI bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP Bridge (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 420] (rev a3)
02:00.0 VGA compatible controller: Trident Microsystems TGUI 9660/938x/968x (rev d3)
02:01.0 VGA compatible controller: Matrox Graphics, Inc. MGA 1064SG [Mystique] (rev 02)
02:02.0 Multimedia audio controller: Creative Labs [SB Live! Value] EMU10k1X
02:02.1 Input device controller: Creative Labs [SB Live! Value] Input device controller

 

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Live [Dell Sound Blaster Live!], device 0: emu10k1x [EMU10K1X Front]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Live [Dell Sound Blaster Live!], device 1: emu10k1x [EMU10K1X Rear]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Live [Dell Sound Blaster Live!], device 2: emu10k1x [EMU10K1X Center/LFE]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

 aplay -L
default:CARD=Live
    Dell Sound Blaster Live!, EMU10K1X Front
    Default Audio Device
front:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    Front speakers
surround40:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
iec958:CARD=Live,DEV=0
    Dell Sound Blaster Live!, EMU10K1X Front
    IEC958 (S/PDIF) Digital Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)

 

lsmod | grep -i snd
snd_emu10k1x           24068  7
snd_ac97_codec        111652  1 snd_emu10k1x
snd_pcm_oss            46848  0
snd_mixer_oss          22784  1 snd_pcm_oss
snd_pcm                83204  5 snd_emu10k1x,snd_ac97_codec,snd_pcm_oss
snd_seq_dummy          10884  0
snd_seq_oss            38528  0
snd_seq_midi           14336  0
snd_rawmidi            29824  2 snd_emu10k1x,snd_seq_midi
snd_seq_midi_event     15232  2 snd_seq_oss,snd_seq_midi
snd_seq                57776  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              29960  4 snd_pcm,snd_seq
snd_seq_device         15116  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd                    63396  20 snd_emu10k1x,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              15328  1 snd
ac97_bus                9856  1 snd_ac97_codec
snd_page_alloc         16136  2 snd_emu10k1x,snd_pcm

 

 

 

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