[PlanetCCRMA] SIIG-USB SoundWave 7.1 Pro

[Fernando Lopez-Lezcano]

On Tue, 2007-08-28 at 19:41 -0400, John Dey wrote:
> Hi Fernando,
> 
> Thanks for your response.  The output from the 2 commands are shown 
> below.  I should mention that the soundcard has two female jacks: one 
> for audio out and the other for mic in.  The audio out has two uses: 
> for headphones or for a spdif output cable (optical) that I am 
> attaching to a audio receiver.  It is my understanding that that cable 
> should carry the 7.1 signal.  When I plug in headphones to receiver 
> directly, I hear stereo.  When I plug in the spdif cable and listen to 
> the headphone jack on the audio receiver I hear stereo.  I don't have 
> speakers connect since they have not been delivered.
> 
> John
> 
> [root at localhost robo6]# cat /proc/asound/cards
>   0 [default        ]: USB-Audio - C-Media USB Headphone Set
>                        C-Media USB Headphone Set   at 
> usb-0000:00:1d.0-2, full speed
>   1 [Intel          ]: HDA-Intel - HDA Intel
>                        HDA Intel at 0xee400000 irq 21
> [root at localhost robo6]# cat /proc/asound/devices
>    2:        : timer
>    3: [ 0- 0]: digital audio playback
>    4: [ 0- 0]: digital audio capture

Well, the ALSA driver only sees two devices that correspond to the USB
card, one input and one output. The output, I presume, is the one that
you see when you use jack (and is stereo). 

I would be surprised if you could get 7.1 from this card with the usb
ALSA driver. If you fire up alsamixer in a terminal, what do you see in
terms of controls?

Even if you could somehow activate the spdif feature, you would not
actually see 8 discrete channels in the jack window, you would probably
have to have a Dolby Digital encoder that would translate 8 channels at
_its_ input into a digital compressed stream that you would then feed to
the card, somehow. 

Sorry to not have better news...
-- Fernando


>    5: [ 0]   : control
>    6:        : sequencer
>    7: [ 1- 1]: digital audio playback
>    8: [ 1- 0]: digital audio playback
>    9: [ 1- 0]: digital audio capture
>   10: [ 1]   : control
> 
> 
> On Aug 28, 2007, at 4:32 PM, Fernando Lopez-Lezcano wrote:
> 
> > On Tue, 2007-08-28 at 14:59 -0400, John Dey wrote:
> >> Hi,
> >>
> >> I have the above listed usb soundcard.  (See a partial lsmod and
> >> lsusb dump listed below.) The soundcard produces stereo output.
> >> Currently the
> >> Connect tab in the qjackctl window shows playback_1 and
> >> playback_2.  The Setup tab shows output channels at 0.  How do I
> >> configure so that qjackctl shows all eight playback_? channels.
> >> When I set output channels to other than 0 jack will not start.
> >> Any ideas would be appreciated?  Thanks.
> >
> > Jack will automatically use as many channels as the underlying ALSA
> > driver does, so changing "output channels" will not help.
> >
> > What does:
> >   cat /proc/asound/cards
> > and
> >   cat /proc/asound/devices
> > show?
> >
> > -- Fernando
> >
> >
> >
> >> [robo6 at localhost ~]$ /sbin/lsusb
> >> ...
> >> Bus 001 Device 004: ID 0d8c:000c C-Media Electronics, Inc. Audio 
> >> Adapter
> >>
> >> [robo6 at localhost ~]$ /sbin/lsmod | grep usb
> >> snd_usb_audio          83072  3
> >> snd_pcm                     80900  4
> >> snd_hda_intel,snd_hda_codec,snd_pcm_oss,
> >>                                        snd_usb_audio
> >> snd_usb_lib               20608  1 snd_usb_audio
> >> snd_rawmidi              28160  1 snd_usb_lib
> >> hci_usb                       21916  2
> >> bluetooth                    61668  8 hidp,rfcomm,l2cap,hci_usb
> >> snd_hwdep               13572  1 snd_usb_audio
> >> snd                              57604  16
> >> snd_hda_intel,snd_hda_codec,snd_seq_oss,
> >>
> >> snd_seq,snd_pcm_oss,snd_mixer_oss,snd_usb_audio,
> >>
> >> snd_pcm,snd_rawmidi,snd_seq_device,snd_hwdep,snd_timer