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C-Media Electronics CM108 Audio Controller
https://linux-hardware.org/index.php?id=usb:0d8c-013c
Hardware for Linux. About Probes Trends Find Computer Find Parts Device 'C-Media Electronics CM108 Audio Controller' ID: USB 0d8c:013c: Class: 01-01-00: Type:
dreaMING of Fusion: Fixing USB audio controller (CM108 ...
https://sonofusion82.blogspot.com/2015/05/fixing-usb-audio-controller-cm108-for.html
When I measured the output voltage, it shows a 2 - 4 V bias voltage which is unusual because it should not have any bias voltages and normally 0 V when no audio. When plugged into my Linux machine, lsusb shows the following: $ lsusb | grep -i audio. Bus 005 Device 003: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller.
CM108 Headset Audio Controller DataSheet
https://www.qsl.net/om3cph/sb/CM108_DataSheet_v1.6.pdf
CM108 is a highly integrated single chip USB audio solution. All essential analog modules are embedded in CM108, including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator, and USB transceiver. It is very suitable for USB headset, USB earphone or USB audio interface box application.
Howto Write to the GPIO Pin of the CM108 Chip in Linux?
https://stackoverflow.com/questions/899008/howto-write-to-the-gpio-pin-of-the-cm108-chip-in-linux
The CM108 from C-Media has 4 GPIO pin that you can access via a hid interface. Using the generic write function in Windows I was able to write to the gpio pins. However I'm trying to do the same thing in Linux without success. The linux kernel detect the device as a hidraw device. Note: I was able to read from the device, just not write.
USB Sound Device - antiX Linux
https://antixlinux.com/forum-archive/usb-sound-device-how-to-load-alsa-solved-t4723.html
It's a CM108AH chip, apparently; it's consistently reported as CM108 in everything that detects it (including on my desktop antiX system). This sound chip is reportedly fully supported by Linux. I don't get sound from the USB unit on my desktop antiX system, either, but I suspect that's because ALSA is using only the on-board hardware.
Anyone find a MS Teams for Linux headset combo that …
https://docs.microsoft.com/answers/questions/17421/anyone-find-a-ms-teams-for-linux-headset-combo-tha.html
It gives good audio calls and is very simple and works well. In Linux it shows up as a CM108 Audio controller and Teams on Linux mapped it automatically. I'm using it with a 10ft USB 3.0 A-B extension cable.
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