This function returns "true" if volume control exists on the specified channel of the feature unit. Channel 0 indicates master volume control. This function is only applicable to a feature unit. Prior to calling this function the entity object should be obtained by calling USB_HOST_AUDIO_V1_ControlEntityGetFirst, USB_HOST_AUDIO_V1_ControlEntityGetNext, or USB_HOST_AUDIO_V1_EntityObjectGet.

bool USB_HOST_AUDIO_V1_FeatureUnitChannelVolumeExists(
    USB_HOST_AUDIO_V1_OBJ audioObj, 
    USB_HOST_AUDIO_V1_CONTROL_ENTITY_OBJ entityObject, 
    uint8_t channel
);

• true - Volume control exists on the specified channel
• false - Volume control does not exist on the specified channel

None.