John S. Denker wrote:
> As requested:
>
> 1)    lsusb
> Unknown line at line 1809
> Duplicate HUT Usage Spec at line 2650
> Bus 001 Device 001: ID 0000:0000 Virtual Hub
> Bus 001 Device 003: ID 041e:3000 Creative Labs

Oops. I forgot to tell you to use "lsusb -vv". But don't bother, the od
output suffices for now.

> 2) The od is attached as a .txt file.

The descriptors announce the following capabilities:

interface 0: various (mixer) controls
interface 1: output 16 bits at 48 kHz, 2 channels
interface 2: input 16 bits at 8/16/24/32/48 kHz, 2 channels
interface 3: output AC-3 at 44.1/48 kHz

... and that's it.

Now when I look at the specifications at
<http://www.soundblaster.com/products/extigy/specs.asp> it turns out that
Creative isn't outright lying, only being _extremely_ misleading: the page
says that the ADC and DAC are capable of converting 24 bit data at 96kHz,
but it does _not_ say that this bit depth and/or samping rate can be used
to playback or record data from/to the computer. (It says the SPDIF input
can do 24@96, but that's of no use if this format cannot be sent over the
USB bus.)

6-channel output is supported with AC-3 only, but the driver currently
doesn't support AC-3.


To summarize: Where it matters, the Extigy does neither 24 bits nor 96kHz.
For professional audio, you have to go elsewhere.


Best regards,
Clemens



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