[alsa-devel] X-Fi Titanium: Capture is possible only with unmuted input

[Thor Kristoffersen]

On Mon, Aug 30, 2010 at 11:32 AM, Takashi Iwai <tiwai at suse.de> wrote:
>> On Mon, Aug 30, 2010 at 11:07 AM, Takashi Iwai <tiwai at suse.de> wrote:
>> >> On Mon, Aug 30, 2010 at 10:46 AM, Takashi Iwai <tiwai at suse.de> wrote:
>> >> >> >> I'm having issues with an X-Fi Titanium and ALSA.  The problem is that
>> >> >> >> it appears to be impossible to capture without unmuting the channel I'm
>> >> >> >> capturing from.
>> >> >> >
>> >> >> > What do you mean exactly "unmuting the channel I'm capturing from"?
>> >> >> > If you mean to turn on/off "XXX Capture Switch", then it's a feature,
>> >> >> > no bug.
>> >> >>
>> >> >> No, I mean that capture is possible only when mute=off and capture=on.
>> >> >
>> >> > Which mute?  Please be more specific.
>> >>
>> >> The signal I'm trying to capture is coming in through the SPDIF-i
>> >> channel, so I'm talking about the mute and capture flags on that
>> >> channel. However, I also tried the analog input (line), and the
>> >> problem is exactly the same on that channel.
>> >
>> > Well, this is still unclear (what actually do you mean "channel") but
>> > let me guess:
>> >
>> >  the recording from either mic or line-in doesn't work unless you unmute
>> >  via "Front Playback Switch" mixer element.
>> >
>> > Correct?
>>
>> Not really. I use gnome-alsamixer, and there is a mixer element called
>> "SPDIF-i" that has a slider, a "Mute" switch, and a "Capture" switch.
>> I connect a digital source to the SPDIF input on the card, and then I
>> try to record it with arecord from device hw:0,0. The only way I'm
>> able to record sound is by setting the Mute switch (of the SPDIF-i
>> mixer element) to off and the Capture switch to on.
>
> There is no mixer switch names "SPDIF-i".  It's cut in alsamixer's
> display.  To check more exactly, make a diff of amixer outputs between
> working and non-working states.
>
> But, what you wrote above is about the SPDIF input, not about the
> analog input, right?  Let's focus on one of them first.

The problem is exactly the same with the analog input, but we'll focus
on the digital input first. I don't have access to my computer right
now, but I'll send you the diffs later today.