Quote Originally Posted by Feanor View Post
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The bad news is that my SMSL DAC doesn't handle USB properly, at least in that the DAC's output is reduced to an unacceptably low level when using USB input. The better news is that this previous DAC of mine with its CM102S USB receiver works quite well. I used the AUDIO4all music player => device interface software presently whereas I used my S/PDIF-capable sound card's custom ASIO driver before the computer switch.
SMSL manufacturer is here:

Shenzhen shuangmusanlin electronic Co., LTD

You may contact them about the USB issue. They may have a USB firmware update for download- now is empty in the download section.