Attached error log snippet for the reference.
I tried to build after setting this configuration flag in mentioned location, still not able flash board properly.after flash it was in read color.
Could you try the application without any modification?
still same behaviour
Try this 7217.nrf5340_audio.7z for NCS v2.9.0.
I have tested it can build with "west build -b nrf5340_audio_dk_nrf5340_cpuapp --pristine -- -DCONFIG_AUDIO_DEV=2" without issue.
