Voice, speech and previews (iOS & macOS)

How do I change the voice? Open Settings, Voice section, and choose an available voice from the list. How do I adjust rate, pitch, or volume? Use the sliders in Settings → Voice; you can Preview Voice to hear changes. Will voice and speech settings apply immediately? Yes — changes are applied and persisted when you adjust sliders or choose a voice.
Voice, speech and previews (iOS & macOS) photo