FWIW, mine worked fine under XP64. That is, I didn't load any drivers.
The last time I messed with this on Suse 11.1 (also 64 bit), I managed
to get some distorted audio.
I'd like to get this USB card working eventually, but for expediency, I
used several Diamond XS71 PCI cards in a PCI expander. For one
application, I need to get the sound card in 8 bit mode, which I'm not
sure can be done with the USB device.
Dan Allongo wrote:
Hi all.
I just got this chip off of e-bay like the rest of you and was
disappointed to find that it's not working.
Well, it's now been a couple hours of reading the ALSA wiki and figuring
out where to look in the source code, but I've finally got this chip
working in .20 under Debian.
After sniffing USB data with Wireshark on a VirtualBox instance of
WinXP, I noticed that config data was being sent from the host shortly
after device enumeration.
This makes sense since it didn't work in Windows either until I
installed the driver (so much for following USB audio standards?).
I can only assume that the drivers contain the default settings for the
device to be usable.
Why the registers don't look like this on reset is beyond me, but whatever.
In usbaudio.c in the snd_usb_audio_probe function (somewhere in the
vicinity of line 3500) you need to enable the "boot quirk" for this chip:
/* C-Media CM6206 / CM106-Like Sound Device */
if (id == USB_ID(0x0d8c, 0x0102)) {
if (snd_usb_cm106_boot_quirk(dev) < 0)
goto __err_val;
}
Looks like the chip needs some config parameters sent to it via HID
which are already there courtesy of the Turtle Beach hack.
The register setup is outlined in the datasheet (I found it here:
http://pdf1.alldatasheet.net/datasheet-pdf/view/158787/CMEDIA/CM106-L+.html)
on page 21.
The key is to set b15 in register 0x02 so that we can get the output.
Hope that helps,
---Dan
------------------------------------------------------------------------
------------------------------------------------------------------------------
Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
is a gathering of tech-side developers & brand creativity professionals. Meet
the minds behind Google Creative Lab, Visual Complexity, Processing, &
iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian
Group, R/GA, & Big Spaceship. http://www.creativitycat.com
------------------------------------------------------------------------
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
------------------------------------------------------------------------
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.339 / Virus Database: 270.12.36/2126 - Release Date: 05/21/09 06:22:00
No virus found in this outgoing message.
Checked by AVG - www.avg.com
Version: 8.0.339 / Virus Database: 270.12.36/2126 - Release Date: 05/21/09 06:22:00
------------------------------------------------------------------------------
Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
is a gathering of tech-side developers & brand creativity professionals. Meet
the minds behind Google Creative Lab, Visual Complexity, Processing, &
iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian
Group, R/GA, & Big Spaceship. http://www.creativitycat.com
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
