.Net 3.5 で System.Speech.Synthesis.SpeechSynthesizer クラスを使用すると、SpeakProgressEventArgs の AudioPosition プロパティが不正確に見えます。
次のコードは、次の出力を生成します。
コード：
using System;
using System.Speech.Synthesis;
using System.Threading;
namespace SpeechTest
{
class Program
{
static ManualResetEvent speechDoneEvent = new ManualResetEvent(false);
static void Main(string[] args)
{
SpeechSynthesizer synthesizer = new SpeechSynthesizer();
synthesizer.SpeakProgress += new EventHandler<SpeakProgressEventArgs>(synthesizer_SpeakProgress);
synthesizer.SpeakCompleted += new EventHandler<SpeakCompletedEventArgs>(synthesizer_SpeakCompleted);
synthesizer.SetOutputToWaveFile("Test.wav");
synthesizer.SpeakAsync("This holiday season, support the music you love by shopping at Made in Washington, online and at one of five local stores. Made in Washington chocolates, bountiful gift baskets and ornaments are the perfect holiday gifts for family, friends and co-workers.");
speechDoneEvent.WaitOne();
}
static void synthesizer_SpeakCompleted(object sender, SpeakCompletedEventArgs e)
{
speechDoneEvent.Set();
}
static void synthesizer_SpeakProgress(object sender, SpeakProgressEventArgs e)
{
Console.WriteLine("SpeakProgress: AudioPosition=" + e.AudioPosition + ",\tCharacterPosition=" + e.CharacterPosition + ",\tCharacterCount=" + e.CharacterCount + ",\tText=" + e.Text);
}
}
}
出力：
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
ただし、生成される .wav ファイルの長さは 15.69 秒です。Stream または null に出力すると、同じ動作が発生します。
プロパティのドキュメントには、プロパティは「オーディオ出力ストリーム内のイベントの時間位置を表す TimeSpan オブジェクト」であると記載されています。
出力ファイルで単語が話し始めた時間または話し終わった時間を示す正確な時間である必要がありますか、それとも誤解していますか?