How to save text-to-speech as a wav with Microsoft SAPI?

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Hello. I want to save the text-to-speech as a WAV file, right after it is being played.

SpeechSynthesizer ss = new SpeechSynthesizer();
SpeechAudioFormatInfo info = new SpeechAudioFormatInfo(8, AudioBitsPerSample.Sixteen, AudioChannel.Mono);

SpVoice voice = new SpeechLib.SpVoice();

ss.Volume = 100; //set the volume of voice (100 is highest)
ss.Rate = 3; //set how fast the speaker speaks 

voice.Speak("Hello there. How are you?", SpeechVoiceSpeakFlags.SVSFlagsAsync);

ss.SetOutputToWaveFile(@"C:\Sound\HelpSound.wav", info);

That's what I have. Yes, there is HelpSound.wav file in my C after that. However, the size of the file is 0 byte. When I click, it's not playing anything.
Does anybody have any idea?

Thanks.

Posted 18-Nov-10 18:02pm

Little Daffodil

Updated 18-Nov-10 18:05pm

RaviRanjanKr

v2

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Alegria_Lee · Accepted Answer · 2010-11-18T18:24:00

Code bellow is given in the sample.

SpeechStreamFileMode SpFileMode = SpeechStreamFileMode.SSFMCreateForWrite;
            SpFileStream SpFileStream = new SpFileStream();
            SpFileStream.Open(@"C:\test.wav", SpFileMode, false);
            voice.AudioOutputStream = SpFileStream;
            voice.Speak(textBox1.Text.Trim(), flag);
            voice.WaitUntilDone(Timeout.Infinite);//Using System.Threading;
            SpFileStream.Close()