Function AudioUnitSetProperty 

pub unsafe extern "C-unwind" fn AudioUnitSetProperty(
    in_unit: AudioUnit,
    in_id: AudioUnitPropertyID,
    in_scope: AudioUnitScope,
    in_element: AudioUnitElement,
    in_data: *const c_void,
    in_data_size: u32,
) -> i32

Available on crate features AUComponent and AudioComponent only.

sets the value of a specified property

The API can is used to set the value of the property. Property values for audio units are always passed by reference

Parameter inUnit: the audio unit

Parameter inID: the property identifier

Parameter inScope: the scope of the property

Parameter inElement: the element of the scope

Parameter inData: if not null, then is the new value for the property that will be set. If null, then inDataSize should be zero, and the call is then used to remove a previously set value for a property. This removal is only valid for some properties, as most properties will always have a default value if not set.

Parameter inDataSize: the size of the data being provided in inData

Returns: noErr, or various audio unit errors related to properties

Safety

• in_unit must be a valid pointer.
• in_data must be a valid pointer or null.