Class 1 configurations of apps that also define AUDIO_CLASS_FALLBACK as
1 failed to build as the devDesc_Audio2 struct now only exists when
AUDIO_CLASS is defined as 2. This change was introduced in commit
ca1925db7a.
USB AUDIO MODULE ================ :scope: General Use :description: Core USB Audio Module :keywords: USB Audio UAC2 :boards: XR-USB-AUDIO-20-MC