will probably check with some friends over the weekend if anyone has a USB DAC Amplifier and test out some configurations

Cambridge audio is a usb DAC and dr overlay is not required - dt overlays are only for pi HAT based dacs to Load drivers

now that wav file plays you should be able to play audio from berry audio after selecting Camebridge dacmagic100 plughw:CARD=C2,DEV=0 from the device selection dropdown in the Mixers settings

Make sure you restart berryaudio leave the DAC powered on and connected

Let me know how that goes

Hmm that shows that the pi is not able to get any audio out of the DAC, even though it can see the device

Is the device connected to the pi usb port?

can you following command --> lsusb

also is the amp turned on while testing this?

Since the DAC is already been detected lets try using plughw:CARD=C2,DEV=0. to see if its working and let me know the results for the following tests

Test 1:
sudo systemctl stop berryaudio.service
sudo systemctl stop camilladsp.service

aplay -D hw:CARD=C2,DEV=0 /usr/share/sounds/alsa/Front_Center ...

Thank you for sharing this information. i am very keen to make this work with your support , I will check out moode audio config for dacmsgic today

Thats humming seems to be noise
From a floating ground to the amp which is okay and means your amp is working

i am still looking for online references for missing configs where users have got it working with dacmagic

Ah sorry I missed out on a comma, use the attached file

Noted! Thank you for confirming

Noted ! will fix it with the next release thanks for pointing it out