I am using my C# code with “https://eastus.tts.speech.microsoft.com/cognitiveservices/v1” to get audio for English words. It was working well until I suddenly noticed that for certain words, it returns empty audio. For example, for the word “black.”
At first, I thought that the audio for some words was simply missing, but then I tried calling the same API from Python or directly from curl and I was able to get the audio for the words that were missing.
What is the explanation for this? Are they accessing different locations? How can I change the C# code so that it can successfully retrieve these words?
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I tried the code below to convert Azure text to speech and got the speech for all the words I placed in my text in the code.
Code :
using Microsoft.CognitiveServices.Speech;
using Microsoft.CognitiveServices.Speech.Audio;
class Program
{
static async Task Main(string[] args)
{
string textToSynthesize = "Hello, this is a test of the Azure Cognitive Services text-to-speech API with black.";
string outputAudioFilePath = "path to/<wavefile>.wav";
await ConvertTextToSpeech(textToSynthesize, outputAudioFilePath);
}
static async Task ConvertTextToSpeech(string textToSynthesize, string outputAudioFilePath)
{
var speechConfig = SpeechConfig.FromSubscription("<speech_key>", "<speech_region>");
speechConfig.SpeechSynthesisLanguage = "en-US";
speechConfig.SpeechSynthesisVoiceName = "en-US-AvaMultilingualNeural";
var audioConfig = AudioConfig.FromWavFileOutput(outputAudioFilePath);
var synthesizer = new SpeechSynthesizer(speechConfig, audioConfig);
var result = await synthesizer.SpeakTextAsync(textToSynthesize);
if (result.Reason == ResultReason.SynthesizingAudioCompleted)
{
Console.WriteLine($"Speech synthesized to [{outputAudioFilePath}] for text: {textToSynthesize}");
}
else if (result.Reason == ResultReason.Canceled)
{
var cancellation = SpeechSynthesisCancellationDetails.FromResult(result);
Console.WriteLine($"CANCELED: Reason={cancellation.Reason}");
if (cancellation.Reason == CancellationReason.Error)
{
Console.WriteLine($"CANCELED: ErrorDetails=[{cancellation.ErrorDetails}]");
}
}
}
}
Output :
The following code ran successfully as below,
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