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Fix no audio: send raw SAPI XML instead of a W3C SSML document #6

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Fix no audio: send raw SAPI XML instead of a W3C SSML document #6

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6 changes: 5 additions & 1 deletion SpeechMod/Voice/WindowsSpeech.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,11 @@ private string FormatGenderSpecificVoices(string text)

private void SpeakInternal(string text, float delay = 0f)
{
text = SpeakBegin + text + SpeakEnd;
// Send raw SAPI XML (a "<voice .../>" fragment) as-is. Do NOT wrap it in a W3C
// <speak xmlns="http://www.w3.org/2001/10/synthesis"> document: that wrapper makes SAPI
// ignore the proprietary <voice required="Name=..."> selection (so it falls back to the
// system default voice) and makes neural engines such as NaturalVoiceSAPIAdapter reject
// the markup with SPERR_UNSUPPORTED_FORMAT (0x80045003) -> no audio.
if (Main.Settings?.LogVoicedLines == true)
Debug.Log(text);
WindowsVoiceUnity.Speak(text, Length(text), delay);
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