Comments on: USB sound card repair

By: Andrew Korsak

Andrew Korsak — Wed, 11 Dec 2024 03:02:19 +0000

I think I blew out something in my CM6206 when I unplugged the USB cable from the computer before unplugging the LINE input from a radio audio output. Has anyone made this mistake? Also I think my receiver audio level may have been too high. Windows 10 device manager tells me the device failed. What components(s) could have been damaged?

By: Tomi Engdahl

Tomi Engdahl — Mon, 23 Oct 2023 10:42:19 +0000

#413 Your PC Soundcard is an Oscilloscope, a Signal Generator, and a Spectrum Analyzer (Arta, REW)
https://www.youtube.com/watch?v=dX0QkL8xMmE

Oscilloscopes and signal generators are handy tools in our labs. Unfortunately, they are not cheap. What if you had such devices already and did not know?
All newer PCs have loudspeakers and a microphone. So they can create sound as well as record it. And usually in decent quality. Like oscilloscopes and signal generators! We only need a connection and software to create the desired waveforms and visualize the measured voltages. Fortunately, such software is available. And the best: We can use it free of charge!

By: Tomi Engdahl

Tomi Engdahl — Fri, 08 Sep 2023 08:10:09 +0000

usb sound adapter 7 .1circuit diagram#2023
https://www.youtube.com/watch?v=K4UIuImXzDg

By: Tomi Engdahl

Tomi Engdahl — Sat, 15 May 2021 12:39:22 +0000

Well, most USB soundcards are USB Full Speed (ie. “USB 1.1″) devices. And this fact has one somewhat horrible consequence: all the FS soundcards expect that isochronous USB transfers have bounded latency, which is not true when there are two transaction translators (“3.0″ -> “2.0″ and “2.0″->FS) in the hub hierarchy. And then there are Intel’s reference designs for embedded motherboards with lots of USB2 ports which are implemented by having the first Hub/TT layer on the motherboard…

By: Tomi Engdahl

Tomi Engdahl — Thu, 15 Apr 2021 06:04:21 +0000

Comments from Facebook:

I have one of these, had it a long time, i keep it in my emergency box just in case my dj controller fails, latency is pants but audio quality pretty good, gets the job done.

By: Mark S.

Mark S. — Mon, 06 Jul 2020 18:41:03 +0000

FYI: I use the same unit for old LPs and tapes conversion to FLAC with really good results, but after simple modification:
- Improve low frequency response by replacing C30 and C31 capacitors from 0.1uF to 4.7uF
- Improve power delivery from USB, it will eliminate noise ratio.

Ref. link: http://www.linuxmediaserver.net/mods/few-ideas-about-tweaking-a-chinese-cm6206lx-based-usb-sound-card/

By: Al

Al — Wed, 18 Mar 2020 19:22:26 +0000

Thanks man, i had EXACTLY the same problem! You’ve made my day

By: Tomi Engdahl

Tomi Engdahl — Thu, 06 Feb 2020 14:03:18 +0000

Chinese sound recorder SM6206 inside view
https://www.youtube.com/watch?v=L7D9_Isa1F0

By: Tomi Engdahl

Tomi Engdahl — Mon, 19 Nov 2018 12:44:21 +0000

The card I have looks pretty similar to this:

External 5.1 Channel USB 2.0 Sound Card Optical Audio Adapter – Black
https://www.dx.com/p/external-5-1-channel-usb-2-0-sound-card-optical-audio-adapter-black-41289?r=8527370