Update: I now have resolved the issue, and the R3 is working as a USB DAC from my computer with the TUSB audio driver. I have thus edited this post accordingly. However, there is now a NEW issue: There is noticable and audible popping and crackling in the audio when I play video or audio files, or stream video, on my computer while using the Hiby R3 as a USB DAC. I have checked, and there is no such crackling or popping, ever, while playing any kind of audio from the Hiby R3 on its own as a portable player; nor is there any such popping or crackling in the audio straight from my computer. It only happens when using the R3 as a USB DAC. I am obviously very disappointed about this, as I was looking forward to using the R3's functionality as a USB DAC, but as it stands, it is now useless to me except as a portable player alone. Has anyone else had this issue? Could it perhaps simply be a result of potential crappyness of the included USB data cable that came with the R3? I ask this because the crackling sounds seem to change somewhat on each playthrough of the same video or audio file or stream. On each play through of the same audio, the crackling will happen in generally the same parts of the recording, but is noticeably completely different (in duration in each part where it appears, volume, etc.) on each play through of the same recording.