Takashi Iwai <tiwai@xxxxxxx> writes: > At Mon, 30 Aug 2010 11:18:01 +0200, > Thor Kristoffersen wrote: >> >> On Mon, Aug 30, 2010 at 11:07 AM, Takashi Iwai <tiwai@xxxxxxx> wrote: >> >> On Mon, Aug 30, 2010 at 10:46 AM, Takashi Iwai <tiwai@xxxxxxx> 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. I'm not sure I understand what you mean. There is definitely a mixer element called "S/PDIF-in". It is present in gnome-alsamixer, alsamixer, and amixer (though in gnome-alsamixer the text says "S/PDIF-i"). This is what the element looks like in the amixer output: Simple mixer control 'S/PDIF-in',0 Capabilities: pvolume cvolume pswitch pswitch-joined cswitch cswitch-joined penum Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 256 Capture 0 - 256 Front Left: Playback 256 [100%] [0.00dB] [off] Capture 256 [100%] [0.00dB] [on] Front Right: Playback 256 [100%] [0.00dB] [off] Capture 256 [100%] [0.00dB] [on] > To check more exactly, make a diff of amixer outputs between > working and non-working states. Ok, here's a transcript of the test that reproduces the issue. First I send in a digital stream on the S/PDIF input on the sound card. Then I set the "S/PDIF-in" mixer control to volume=100%, mute=on, capture=on. Then I issue the following commands. [calvin:~]amixer > capture-not-working.txt [calvin:~]arecord -D hw:0,0 -c 2 -f S16_LE -r 96000 -d 5 sndtest1.wav Recording WAVE 'sndtest1.wav' : Signed 16 bit Little Endian, Rate 96000 Hz, Stereo [calvin:~]aplay -D hw:0,0 sndtest1.wav Playing WAVE 'sndtest1.wav' : Signed 16 bit Little Endian, Rate 96000 Hz, Stereo No sound is played. Now I change the "S/PDIF-in" mixer control to mute=off. Then I issue the following commands. [calvin:~]amixer > capture-working.txt [calvin:~]arecord -D hw:0,0 -c 2 -f S16_LE -r 96000 -d 5 sndtest1.wav Recording WAVE 'sndtest1.wav' : Signed 16 bit Little Endian, Rate 96000 Hz, Stereo [calvin:~]aplay -D hw:0,0 sndtest1.wav Playing WAVE 'sndtest1.wav' : Signed 16 bit Little Endian, Rate 96000 Hz, Stereo Sound plays just fine. This is the diff between the non-working and working states: [calvin:~]diff -u capture-not-working.txt capture-working.txt --- capture-not-working.txt 2010-08-30 19:01:02.344319762 +0200 +++ capture-working.txt 2010-08-30 19:01:46.964945361 +0200 @@ -59,8 +59,8 @@ Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 256 Capture 0 - 256 - Front Left: Playback 256 [100%] [0.00dB] [off] Capture 256 [100%] [0.00dB] [on] - Front Right: Playback 256 [100%] [0.00dB] [off] Capture 256 [100%] [0.00dB] [on] + Front Left: Playback 256 [100%] [0.00dB] [on] Capture 256 [100%] [0.00dB] [on] + Front Right: Playback 256 [100%] [0.00dB] [on] Capture 256 [100%] [0.00dB] [on] Simple mixer control 'S/PDIF-out',0 Capabilities: pvolume pswitch pswitch-joined penum Playback channels: Front Left - Front Right Please let me know if there are any other tests you want me to perform. Thor _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
