There is no audio output when using certain SpeechSynthesisVoiceName to synthesize ** characters

[Zhangbao-Yan]

• A stripped down, simplified version of your source code that exhibits the issue. Or, preferably, try to reproduce the problem with one of the public samples in this repository (or a minimally modified version of it), and share the code.

val speechSynthesizer = SpeechSynthesizer(SpeechConfig.fromEndpoint(URI.create("your endpoint")).apply {
    setSpeechSynthesisOutputFormat(SpeechSynthesisOutputFormat.Riff16Khz16BitMonoPcm)
    speechSynthesisLanguage = "en"
    speechSynthesisVoiceName = "en-CA-ClaraNeural"
})
speechSynthesizer.SynthesisCompleted.addEventListener { _, e -> 
    Log.d("SpeechSynthesizer","SynthesisCompleted::audioDataSize=${e.result.audioData.size}")
}
speechSynthesizer.StartSpeakingTextAsync("**")

Describe the bug

There is no audio output when using speechSynthesisLanguage = "en" and certain speechSynthesisVoiceName to synthesize more than one contiguous * characters

speechSynthesisVoiceName	Result
en-CA-ClaraNeural	Failed
en-CA-LiamNeural	Failed
en-HK-SamNeural	Failed
en-HK-YanNeural	Failed
en-NG-AbeoNeural	Failed
en-NG-EzinneNeural	Failed
en-PH-JamesNeural	Failed
en-PH-RosaNeural	Failed
en-SG-LunaNeural	Failed
en-SG-WayneNeural	Failed
en-TZ-ElimuNeural	Failed
en-TZ-ImaniNeural	Failed
en-US-ChristopherNeural	Failed
en-US-JennyNeural	Failed
en-ZA-LeahNeural	Failed
en-ZA-LukeNeural	Failed
en-AU-NatashaNeural	Succeed
en-AU-WilliamNeural	Succeed
en-IE-ConnorNeural	Succeed
en-IE-EmilyNeural	Succeed
en-IN-NeerjaNeural	Succeed
en-IN-PrabhatNeural	Succeed
en-KE-AsiliaNeural	Succeed
en-KE-ChilembaNeural	Succeed
en-NZ-MitchellNeural	Succeed
en-NZ-MollyNeural	Succeed
en-GB-RyanNeural	Succeed
en-GB-SoniaNeural	Succeed

Expected behavior

Received correct audio data for synthesizing more than one contiguous * characters

Version of the Cognitive Services Speech SDK

1.41.1

Platform, Operating System, and Programming Language

• OS: Android, iOS
• Hardware - arm64-v8a
• Programming language: Kotlin, Swift

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