At Thu, 13 Jun 2002 22:35:44 +0900, Patrick Shirkey wrote: > > Takashi Iwai wrote: > >>This card is supposed to be 24bit/96Khz. In windows it works like this: > >> > >>4 i/o channels(2 in, 2 out) at 16bit/48Khz or less > >>3 i/o channels(2 in, 1 out or 1 in, 2 out) at 24bit/48Khz or less > >>1 channel at 24bit/96Khz > > > > > > interesting. i don't find any mono channel on the descriptions. > > well, more investigations are necessary. > > > > It is confusing to me also. From reading their docs I thought that the > card was all seperate mono channels lsusb has changed my opinion. I now > belive that Quattro stands for 2 stereo i/o devices not 4 mono i/o devices. > > By saying in the docs that it supports 1 channel at 24bit/96Khz I guess > they mean 1 stereo in or 1 stereo out. that is good news to me becasue I > was under the impression that I had bought a turkey with only one mono > i/o channel at 24/96. i remember a guy from midiman told me that they support two channels 24/96 i/o. well, we have to try whether he's right :)
> >>>i've tested usb mic from Labtec, and it works. > >>>so the problem is specific to the hardware, or multi-channels... > >>> > >> > >>I just remembered that my mouse is a usb mouse too so that is not > >>unexpected. > > > > > > too much bandwidth? > > > > Testing again with the new code didn't lock up my mouse and this time > the file actually recorded data although I still cannot capture noise. > Do you have any ideas on how I can adjust the input levels internally > seeing as the card has no apparent internal mixer? how is the windows driver? do they have such one? > Is this a case of having to write our own mixer device? > > Does this part of lsusb have anything to do with mixer controls? > > ---- > wChannelConfig 0x0003 > Left Front (L) > Right Front (R) > iChannelNames 0 > iTerminal 0 > ---- no, this defines only the configuration of speaker positions. apparently on all streams, the input terminal is directly connected to the output terminal. there is no volume/switch control found at all (at least on usb device descriptions). about the capture, it might be a problem of usb audio driver. right now i cannot test the capture again, because usb mic was already returned to the owner. possibly i can test tomorrow... BTW, the new version is already on cvs. i again modified (clean up) a bit since the version you have, so please check whether it still works for you (i believe it must do, though). Takashi _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas - http://devcon.sprintpcs.com/adp/index.cfm?source=osdntextlink _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
