Sets the preferred number of input channels for the current route.
- iOS 7.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
The number of input channels you want to use.
true if a request was successfully made, otherwise
This method requests a change to the number of input channels. To determine whether the change has taken effect, query or key-value observe the
Requesting input channels less than one or greater than that returned by the
maximum results in an error.
Set the preferred number of input channels only after setting the audio session’s category and mode, and activating the session.