On 13/05/2021 02:57, bob prohaska wrote:
Adrian Caspersz wrote:
On 11/05/2021 16:37, bob prohaska wrote:
I'd like to find a datasheet for an audio ADC used in an inexpensive
USB audio capture "card" so as to better understand how to use it and


paste here the relevant output of the command

lspci -vv

The device is USB 2.0 and is plugged into the USB 2.0 ports on the Pi, which
aren't accessed via PCI.

lsusb reports

Bus 002 Device 002: ID 152d:1561 JMicron Technology Corp. / JMicron USA Technology Corp. JMS561U two ports SATA 6Gb/s bridge
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 2034:0105
Bus 001 Device 005: ID 413c:3010 Dell Computer Corp. Optical Wheel Mouse
Bus 001 Device 004: ID 413c:2002 Dell Computer Corp. SK-8125 Keyboard
Bus 001 Device 003: ID 413c:1002 Dell Computer Corp. Keyboard Hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I tend to think it's probably
Bus 001 Device 007: ID 2034:0105
which was the last USB device plugged in.


If you can find it in there my hat's off to you!


Yup, my bad lsusb it should have been.

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

"Softs 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.

--
Adrian C