C# SpeechSynthesizer的SpeakProgressEventArgs是否不准确？

使用.Net 3.5中的System.Speech.Synthesis.SpeechSynthesizer类，SpeakProgressEventArgs的AudioPosition属性似乎不准确

以下代码生成以下输出：

代码：

但是，生成的.wav文件的持续时间为15.69秒。如果输出到流或null，则会发生相同的行为

属性的表示该属性是“一个TimeSpan对象，表示事件在音频输出流中的时间位置”

---

它应该是一个准确的时间，指示单词在输出文件中开始或结束说话的时间，还是我误解了它？

音频位置取决于语音合成器的选定语音。对于一些Microsoft语音，如Anna、Zira、David、Hazel，正如我所经历的那样，支持的音频格式是16000Hz PCM。因此，以下解决方案可以纠正auido位置：

var format = 
new System.Speech.AudioFormat.SpeechAudioFormatInfo(EncodingFormat.Pcm, 
                                                    16000, 16, 1, 32000, 2, null);
synthesizer.SetOutputToWaveFile("Test.wav", format);

---

如果您注意到，

SetOutputToWaveFile

的默认采样率为22050，正确时间（15.69）与

AudipPosition

（20.25）显示的时间的比率约为0.77。如果将该比率乘以22050，则得到大约16000，这是正确的采样率。

所选语音是多少？

SpeakProgress: AudioPosition=00:00:00.0043750,  CharacterPosition=0,    CharacterCount=4,       Text=This
SpeakProgress: AudioPosition=00:00:00.2925625,  CharacterPosition=5,    CharacterCount=7,       Text=holiday
SpeakProgress: AudioPosition=00:00:00.9086250,  CharacterPosition=13,   CharacterCount=6,       Text=season
SpeakProgress: AudioPosition=00:00:01.9421250,  CharacterPosition=21,   CharacterCount=7,       Text=support
SpeakProgress: AudioPosition=00:00:02.5621250,  CharacterPosition=29,   CharacterCount=3,       Text=the
SpeakProgress: AudioPosition=00:00:02.6760625,  CharacterPosition=33,   CharacterCount=5,       Text=music
SpeakProgress: AudioPosition=00:00:03.2648125,  CharacterPosition=39,   CharacterCount=3,       Text=you
SpeakProgress: AudioPosition=00:00:03.5199375,  CharacterPosition=43,   CharacterCount=4,       Text=love
SpeakProgress: AudioPosition=00:00:03.8435625,  CharacterPosition=48,   CharacterCount=2,       Text=by
SpeakProgress: AudioPosition=00:00:04.0701875,  CharacterPosition=51,   CharacterCount=8,       Text=shopping
SpeakProgress: AudioPosition=00:00:04.6840625,  CharacterPosition=60,   CharacterCount=2,       Text=at
SpeakProgress: AudioPosition=00:00:04.8036250,  CharacterPosition=63,   CharacterCount=4,       Text=Made
SpeakProgress: AudioPosition=00:00:05.0698125,  CharacterPosition=68,   CharacterCount=2,       Text=in
SpeakProgress: AudioPosition=00:00:05.2521250,  CharacterPosition=71,   CharacterCount=10,      Text=Washington
SpeakProgress: AudioPosition=00:00:06.2961875,  CharacterPosition=83,   CharacterCount=6,       Text=online
SpeakProgress: AudioPosition=00:00:07.0540625,  CharacterPosition=90,   CharacterCount=3,       Text=and
SpeakProgress: AudioPosition=00:00:07.3331250,  CharacterPosition=94,   CharacterCount=2,       Text=at
SpeakProgress: AudioPosition=00:00:07.6818750,  CharacterPosition=97,   CharacterCount=3,       Text=one
SpeakProgress: AudioPosition=00:00:08.0598750,  CharacterPosition=101,  CharacterCount=2,       Text=of
SpeakProgress: AudioPosition=00:00:08.2163750,  CharacterPosition=104,  CharacterCount=4,       Text=five
SpeakProgress: AudioPosition=00:00:08.5971875,  CharacterPosition=109,  CharacterCount=5,       Text=local
SpeakProgress: AudioPosition=00:00:09.0243750,  CharacterPosition=115,  CharacterCount=6,       Text=stores
SpeakProgress: AudioPosition=00:00:10.5325625,  CharacterPosition=123,  CharacterCount=4,       Text=Made
SpeakProgress: AudioPosition=00:00:10.7700625,  CharacterPosition=128,  CharacterCount=2,       Text=in
SpeakProgress: AudioPosition=00:00:10.9377500,  CharacterPosition=131,  CharacterCount=10,      Text=Washington
SpeakProgress: AudioPosition=00:00:11.6708125,  CharacterPosition=142,  CharacterCount=10,      Text=chocolates
SpeakProgress: AudioPosition=00:00:12.9798750,  CharacterPosition=154,  CharacterCount=9,       Text=bountiful
SpeakProgress: AudioPosition=00:00:13.6303125,  CharacterPosition=164,  CharacterCount=4,       Text=gift
SpeakProgress: AudioPosition=00:00:14.0959375,  CharacterPosition=169,  CharacterCount=7,       Text=baskets
SpeakProgress: AudioPosition=00:00:14.7848125,  CharacterPosition=177,  CharacterCount=3,       Text=and
SpeakProgress: AudioPosition=00:00:15.0507500,  CharacterPosition=181,  CharacterCount=9,       Text=ornaments
SpeakProgress: AudioPosition=00:00:15.7195000,  CharacterPosition=191,  CharacterCount=3,       Text=are
SpeakProgress: AudioPosition=00:00:15.9872500,  CharacterPosition=195,  CharacterCount=3,       Text=the
SpeakProgress: AudioPosition=00:00:16.1488750,  CharacterPosition=199,  CharacterCount=7,       Text=perfect
SpeakProgress: AudioPosition=00:00:16.7275000,  CharacterPosition=207,  CharacterCount=7,       Text=holiday
SpeakProgress: AudioPosition=00:00:17.3336875,  CharacterPosition=215,  CharacterCount=5,       Text=gifts
SpeakProgress: AudioPosition=00:00:17.9813125,  CharacterPosition=221,  CharacterCount=3,       Text=for
SpeakProgress: AudioPosition=00:00:18.2216875,  CharacterPosition=225,  CharacterCount=6,       Text=family
SpeakProgress: AudioPosition=00:00:19.0973750,  CharacterPosition=233,  CharacterCount=7,       Text=friends
SpeakProgress: AudioPosition=00:00:19.7726250,  CharacterPosition=241,  CharacterCount=3,       Text=and
SpeakProgress: AudioPosition=00:00:19.9655625,  CharacterPosition=245,  CharacterCount=10,      Text=co-workers
SpeakProgress: AudioPosition=00:00:20.2518750,  CharacterPosition=245,  CharacterCount=10,      Text=co-workers

var format = 
new System.Speech.AudioFormat.SpeechAudioFormatInfo(EncodingFormat.Pcm, 
                                                    16000, 16, 1, 32000, 2, null);
synthesizer.SetOutputToWaveFile("Test.wav", format);