@h3ar Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
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Firstly, please note that the primary locale for each voice is indicated by the prefix in its name, such as the voice en-US-AndrewMultilingualNeural
, its primary locale is en-US
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Did you try with zh-CN-XiaochenMultilingualNeural
(Female)
zh-CN-YunyiMultilingualNeural
(Male) instead and check if that makes any difference ?
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Could you please let me know if you have tried the TTS from the Speech Studio ? Do you encounter the same issue there too ?
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Please check the Examples of new multilingual voices in some languages and try playing the example audios mentioned here.
Hope this helps. If you have any follow-up questions, please let me know. I would be happy to help.