[How to do instruction] 128x64 OLED with Song Status and Spectrum Display on Raspberry Pi

[JohnnyBravo]

Could it be that you are sending DSD to the DAC and the Loopback device can't handle it and so the hw:1,0 device, which has the loopback device as a slave, can't be opened?

Maybe that's what the problem is, but unfortunately I also know very little about ALSA.
For now I've reverted to the standard installation method, applying the patch to Moode, etc.

Thanks,
JB