On Fri, 26 Jan 2007, wrote: > Hello, ALSA users! > > I've recently acquired m-audio revolution 7.1 card, that uses > snd-ice1724 driver. I have some issues with it, that I didn't manage > to cope with (alsa 1.0.11, kernel 2.6.17): > > 1. While I can properly adjust the volumes with alsamixer, "alsactl > restore" (on boot) only raises the volume in the right channel. Left > channel stays silent, until I change the PCM control up-down in > alsamixer... Did you remember to save the settings? alsactl store > > 2. The card's specification says, that it's playback format is 24 bit. > But playback only works, when I convert audio to 32-bit format > (S32_LE). Jack also works in 32-bit "mode". Just how can that be? Is > the card's actual resolution 32 bits?? 32 bit mode does not exist. Ie, nothing has 32 bit resolution ( that would be 200dB, and nothing, not even life, has that kind of dynamic range without killing you. But what happens that 24 bits are stored as 32 bits, with one byte all zeros. Which one "depends". The rest I have nothing to say on. > > There's one more thing: if I enable hardware monitoring of output > ports in JACK, and raise the input signal level beyond maximum > amplitude (> 1.0, JACK uses floats), the monitored signal does not get > clipped, but is properly displayed. Does that mean, that card supports > signal range above 1.0? I thought, that integer PCM signal must get > clipped above maximum range (e. g. 65535 for 16-bit)... > > 3. The card's documentation also says that it's recording rate is 96 > kHz, but I can run arecord with just any sample rate up to 192... This > is also quite confusing. Does it mean that the input signal gets > resampled? > > I would be extremely grateful for any help provided. I also apologize, > if I'm asking lame questions. Thank you. > --Artem > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
