[top post for brevity]

A keyword search for 2034:0105 led to
https://shkspr.mobi/blog/2020/08/ins...record-player/
which led to
https://www.ti.com/lit/ds/symlink/pcm2900.pdf
an obsolete USB audio chip.

Trouble is, that chip employs a crystal and the device I'm
dealing with has no crystal. If it's an unlicensed clone it
got improved. Perhaps just a hijacked device ID?

Anyway, it was a fun goose chase.

Thanks for reading,

bob prohaska

bob prohaska wrote:
Adrian Caspersz wrote:

https://the-sz.com/products/usbid/in...34&p=0x0105&n=

iSoft Silicon, Inc. (defunct website)

https://web.archive.org/web/20190122...oducts_01.html

"IS-821
USB stereo ADC, stereo line-in and mono MIC-in, I2C interface, 28-pin
SSOP pack"

Bit of a dead end, but that site says

"Soft?s audio chips are fully compatible the USB plug-and-play profile.
Under most OS platforms, there is no private driver required."

However for electrical specs, pinout etc, I've drawn a blank.


Hmmm. The last reply from tech support was "... we don't quite understand what the question you are asking means".

Maybe it's absurd, but it makes me wonder if the device is a Trojan.
No....that's too clever....

Thanks for humoring me,

bob prohaska