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I have a usb soundcard, and had similar problems when I tested it.
I fixed it by turning off the onboard sound chip in bios.
But there are other ways to change the preference, but with the driver modules instead.
The text file, /etc/modprobe.conf...may list the modules loaded at boot time, eg,
Code:
options snd_usb_audio enable=1 index=0 vid=0582 pid=00e7 id=EDIROL
alias sound-slot-0 snd_usb_audio
to find out your hardware address (vid and pid) type
to find the module type
, (should be quite a list),
shorten it by grepping for specifics, like sound, snd, audio, etc.
on my system...
Code:
glenn@GamesBox:~$ lsmod | grep snd
snd_usb_audio 107687 3
snd_hwdep 6900 1 snd_usb_audio
snd_usbmidi_lib 20926 1 snd_usb_audio
snd_rawmidi 25013 1 snd_usbmidi_lib
snd_seq_dummy 1806 0
snd_seq_oss 34806 0
snd_seq_midi_event 7355 1 snd_seq_oss
snd_seq 61015 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 7098 4 snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 47375 0
snd_pcm 96125 3 snd_usb_audio,snd_pcm_oss
snd_timer 23555 2 snd_seq,snd_pcm
snd_page_alloc 8716 1 snd_pcm
snd_mixer_oss 17620 1 snd_pcm_oss
snd 75507 17 snd_usb_audio,snd_hwdep,snd_usbmidi_lib,snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
soundcore 7869 1 snd
usbcore 212405 12 snd_usb_audio,option,usb_wwan,gspca_spca561,gspca_main,usbhid,usbserial,usb_storage,snd_usbmidi_lib,ohci_hcd,ehci_hcd
glenn@GamesBox:~$
The version of your kernel (type uname -a) and distribution may also affect the outcome of these ls commands.
You need to be root to save any changes to /etc/modprobe.conf
see how you go, regards Glenn