Audio v1.0 Class Driver Events 

This enumeration identifies the possible events that the Audio v1.0 Class Driver attach event handler can generate. The application should register an event handler using the USB_HOST_AUDIO_V1_AttachEventHandlerSet function to receive Audio v1.0 Class Driver Attach events.

typedef enum {
  USB_HOST_AUDIO_V1_EVENT_ATTACH,
  USB_HOST_AUDIO_V1_EVENT_DETACH
} USB_HOST_AUDIO_V1_EVENT;