I have a player built from Raspberry Pi4, DAC2 HD and Aamp60. It was all working fine, running squeezelite over Raspbian 10. Then something went wrong, the SD card failed, and I had to build the software again. So far as I know, it is the same as it was before. The /boot/config.txt is set correctly. But the volume is very much lower than it was previously. There isn't a problem with distortion, just low volume. Other players continue to work normally. What can be wrong?
DAC2HD and AAMP60 low volume