Contents

pitchBase

Get or set a synthesizer’s baseline speech pitch.

Declaration

static let pitchBase: NSSpeechSynthesizer.SpeechPropertyKey

Discussion

An NSNumber object that specifies the baseline speech pitch. Typical voice frequencies range from around 90 hertz for a low-pitched voice to perhaps 300 hertz for a high-pitched voice. These frequencies correspond to approximate pitch values in the ranges of 30.000 to 40.000 and 55.000 to 65.000, respectively.

This property is used with setObject(_:forProperty:) and object(forProperty:).

See Also

Speech Property Keys