SpeechSynthesizerOptions.SpeakingRate Property
Definition
Important
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Gets or sets the tempo (including pauses and hesitations) of the speech synthesis utterance.
public:
property double SpeakingRate { double get(); void set(double value); };double SpeakingRate();
void SpeakingRate(double value);public double SpeakingRate { get; set; }var double = speechSynthesizerOptions.speakingRate;
speechSynthesizerOptions.speakingRate = double;Public Property SpeakingRate As DoubleProperty Value
double
The tempo, relative to the default rate of the selected speech synthesis engine (voice).
This value can range from 0.5 (half the default rate) to 6.0 (6x the default rate), inclusive. The default value is 1.0 (the "normal" speaking rate for the current voice).
Some voices have minimum speaking rates faster than 0.5 and maximum speaking rates slower than 6.0.
Note
Speaking rate cannot be directly translated to words-per-minute because each voice and language can have a different default speaking rate.
Windows requirements
| Device family |
Windows 10 Fall Creators Update (introduced in 10.0.16299.0)
|
| API contract |
Windows.Foundation.UniversalApiContract (introduced in v5.0)
|
Remarks
If Speech Synthesis Markup Language (SSML) is used, SpeakingRate is combined with any prosody tags in the markup.
Note
Prosody are properties of syllables and larger units of speech, not individual phonetic segments (vowels and consonants).
By default, approximately 750ms of silence is appended after each utterance and each punctuation mark to ensure the utterance sounds as natural as possible. In some cases, such as accelerated playback or screen-reader descriptions of app content, this behavior is not required or needs to be configurable by the user. For more info, see AppendedSilence and PunctuationSilence.