Sound problem - Can't play more then one source at a time.

[raffytaffy]

I have a turtle beach ddl 7.1 sound card and i am not able to play more then one source at a time. If i try to turn on another source it gives me errors such as device busy etc etc. Here is some info :

raf@equinox2:~$ lspci
00:00.0 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a1)
00:01.0 ISA bridge: nVidia Corporation MCP61 LPC Bridge (rev a2)
00:01.1 SMBus: nVidia Corporation MCP61 SMBus (rev a2)
00:01.2 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a2)
00:02.0 USB Controller: nVidia Corporation MCP61 USB Controller (rev a2)
00:02.1 USB Controller: nVidia Corporation MCP61 USB Controller (rev a2)
00:04.0 PCI bridge: nVidia Corporation MCP61 PCI bridge (rev a1)
00:06.0 IDE interface: nVidia Corporation MCP61 IDE (rev a2)
00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2)
00:08.0 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2)
00:08.1 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2)
00:09.0 PCI bridge: nVidia Corporation MCP61 PCI Express bridge (rev a2)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:07.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
01:0e.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link)
02:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7600 GS] (rev a1)

raf@equinox2:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: CMI8738MC8 [C-Media PCI CMI8738-MC8], device 0: CMI8738-MC8 [C-Media PCI DAC/ADC]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: CMI8738MC8 [C-Media PCI CMI8738-MC8], device 1: CMI8738-MC8 [C-Media PCI 2nd DAC]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: CMI8738MC8 [C-Media PCI CMI8738-MC8], device 2: CMI8738-MC8 [C-Media PCI IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0

asoundrc config
pcm.au8830 {
type hw
card 0
}

ctl.au8830 {
type hw
card 0
}

pcm.!dmix {
type plug
slave {
pcm surround71
channels 8
}
}
pcm.!default {
type plug
slave.pcm "dmix"
slave.channels 8
route_policy duplicate
}