At Thu, 17 Oct 2002 09:44:40 -0500,
[EMAIL PROTECTED] wrote:
>
> In a bit of good news, although playing back streams dont really want
> to work, if I use the line in on the card and shove in the output from
> my onboard sound card, I actually get sound of the card now while it
> is connected via usb to the laptop. Earlier, the only way to get sound
> of the card while booted into linux was to disconnect it completely
> and use it as a stand-alone device in the same manner. As a result, I
> can test a couple of the mixer settings for you. I'm using alsamixer
> for this, doing it by hand via amixer would take a while . . .
alsamixer is also fine. it can do most of things what amixer can.
> The first 4 master controls control front,back, and center-woofer. Not
> sure about the exchange with the last two, I only have a 4.1 sound
> system hooked up into the device. "Master 1" is a general master that
> controls all sound. Bass and treble follow... The PCM interface I
> can't test, due to the same earlier problems. Line and Line 1 seem to
> do the same thing for me at the moment. I would guess that "line" is
> for the specific line in 1/8 jack im using in the front of the unit,
> and that "line 1" is a general control for all input lines... it didnt
> control the mic though. Only the "Mic" control controls the mic.
if you build the module with --with-debug=detect option, there are
kernel messages at loading module about which control corresponds to
which usb mixer unit such like
[10] FU [PCM Playback] ch = 2, val = 0/10
the first number is the unit id and the second is the type of unit,
and the third is the ALSA control name (i.e. the name of mixer
element).
when you compare these unit ids with the picture in usbmixer_maps.c,
you'll get more clues.
it would be appreciated if it can be clarified, which inputs/outputs
correspond to what, so on.
> Now on to the "odd" stuff ... I cant test the digital in and outs.
i guess this is because the corresponding descriptors are not parsed.
but digital out might be possible by some switches, e.g. "Digital Out"
"Digital Out1", "Digital Out2", etc.
> I just don't have another optical audio device here. The "Speaker"
> interface seems like a master mute button. All other interfaces, uh,
> don't seem to do anything. If you can suggest better ways to test, I'm
> all ears. I could do more extensive testing if you like, but uh hmm
> not sure exactly how the logistics of that would work out in real
> life, heh.
there are many unknown switches. please take a look at
usbmixer_maps.c.
Takashi
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