A key indicating the pitch to apply to spoken content.
- iOS 7.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The value of this key is an
NSNumber object containing a floating-point value in the range
2. The value indicates whether the text should be specified spoken with a higher or lower pitch than is used for the default. The default value for this attribute is
1, which indicates a normal pitch. Values between
1 result in a lower pitch and values between
2 result in a higher pitch.