Re: status of usb audio driver

[Patrick Shirkey <pshirkey@boosthardware.com>]

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'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?

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
----





-- 
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.boosthardware.com/LAU/guide/
========================================


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