edgetts

NewSpeech creates a new Speech instance.

WithPitch set pitch of the tts output.such as +50Hz,-50Hz.

WithRate set rate of the tts output.rate=-50% means rate down 50%,rate=+50% means rate up 50%.

WithVolume set volume of the tts output.volume=-50% means volume down 50%,volume=+50% means volume up 50%.