I had my Raspberry Pi 3 Model B with RuneAudio_rpi2_rp3_0.4-beta_20160321_2GB installed, connected via USB to my DAC (NAD M32). I played around with various settings and everything was working fine, but then I tried out one of the other sound signatures. I think I chose Orion or ACX. After getting no sound, I tried to revert back to RuneAudio sound signature, but still have zero output via USB to my DAC. I also tried the ArchLinux default, that didn't output any audio either. HDMI still works to my TV, and my DAC is still picking up on the sampling rate changes even though there's no audio coming through. I tried another source to the DAC and that's working fine, too.
Additionally, I tried to re-flash my SD card with RuneAudio - that didn't fix it. I tried re-flashing with Volumio, too - that didn't fix it either. I've also tried different USB cables and all of the USB ports on the Pi board. Any clue on how to get this working again?
Thanks in advance for any help!