How to increase audio quality of TTS? (Node.js)

Question

Hiya,

I'm playing around with the Text-to-Speech service, using Node.js with code from the quickstart guide, but I can't seem to increase the bitrate of the generated audio? The audio I'm getting doesn't sound nearly as good as that from the demo page, and I'm using the same SSML code it provides.

The speechConfig class says to modify the SpeechSynthesisOutputFormat attribute, but setting it to many different values in the list of available audio formats (tried different RIFFs, RAWs, WebMs, Audios) yields no change at all in the audio quality (same bitrate, filesize).

Would love to hear from someone that's worked with the SDK in Node.js and could confirm or refute that speechConfig.SpeechSynthesisOutputFormat = "Audio24Khz160KBitRateMonoMp3" is the right approach for increasing audio quality.

Thanks

Answer 1

Raul That is the correct setting to use for changing the format. Could you try something like below instead:

speechConfig.speechSynthesisOutputFormat = sdk.SpeechSynthesisOutputFormat.Audio24Khz160KBitRateMonoMp3;

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