I need help diagnosing a problem that recently started happening with my Grant Fidelity TubeDAC-11. Whenever I use a digital input source, I experience a grainy/swirly distortion. I have tried using three different computers running Foobar2000. On all three machines I installed the Yulong ASIO drivers. I have tried listening to music with the Yulong ASIO driver selected as the output device, and with the primary sound driver. I get the same results with both devices. Adjusting the ASIO buffer size makes no difference.
I also tried the Optical out from two of my computers, and experienced the same result. If I use the line input to the DAC, I get perfectly normal sound.
I have recorded a sample of the song I've been using as a test to help illustrate the problem. The recordings aren't great but I think they illustrate the problem. Hopefully someone out there has run into something similar and can point me in the right direction!
Problem sample:
https://drive.google.com/open?id=18ZTVIVQ1zMd1ksOJ7N7UTfLnuWYQViLL
Good sample:
https://drive.google.com/open?id=1d8gnRrPMU2t_3d6eq0cgZhh59ysoBjBA
I also tried the Optical out from two of my computers, and experienced the same result. If I use the line input to the DAC, I get perfectly normal sound.
I have recorded a sample of the song I've been using as a test to help illustrate the problem. The recordings aren't great but I think they illustrate the problem. Hopefully someone out there has run into something similar and can point me in the right direction!
Problem sample:
https://drive.google.com/open?id=18ZTVIVQ1zMd1ksOJ7N7UTfLnuWYQViLL
Good sample:
https://drive.google.com/open?id=1d8gnRrPMU2t_3d6eq0cgZhh59ysoBjBA