Text-To-Speech unable to override system's default voices

[yeelut]

Description

        private async Task PlayText()
        {
            var locales = await TextToSpeech.Default.GetLocalesAsync();
            var selectedLocale = locales.FirstOrDefault(locale => locale.Language == selectedLanguage && locale.Name == selectedVoice);
            Debug.WriteLine(selectedLocale.Name + ":" + selectedLocale.Language);
            SpeechOptions speechOptions = new SpeechOptions()         
            {
                Pitch = 1f,   // 0.0 - 2.0
                Volume = 0.75f, // 0.0 - 1.0
                Locale = selectedLocale
                    
            };
            await TextToSpeech.Default.SpeakAsync("Hello! I am "+selectedVoice + ". This is a Test! Ceci est un test! ¡Esto es una prueba!", speechOptions);
        }

I have tried different Voices for varies languages across different platforms.
But it only uses the system's default Voice for each languages.

Steps to Reproduce

No response

Link to public reproduction project repository

https://github.com/yeelut/MauiTTSSettings

Version with bug

9.0.21 SR2.1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

macOS, iOS, Android, Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[Zhanglirong-Winnie]

Could you provide us with a sample project so we can investigate it further?
Looking forward to your reply!

[yeelut]

Could you provide us with a sample project so we can investigate it further? Looking forward to your reply!

https://github.com/yeelut/MauiTTSSettings

[Zhanglirong-Winnie]

This issue has been verified Visual Studio 17.13 Preview2.1 (9.0.21 & 9.0.0). Can repro this issue on all platforms.

[yeelut]

any timeline for fixing this issue?

[MartyIX]

any timeline for fixing this issue?

It's not scheduled to be fixed at the moment by the MAUI team.

However, if anyone wants to look into the issue, I believe these are the notable lines:

• maui/src/Essentials/src/TextToSpeech/TextToSpeech.shared.cs

  Line 41 in 172dd41

  public static Task<IEnumerable<Locale>> GetLocalesAsync() =>

• maui/src/Essentials/src/TextToSpeech/TextToSpeech.shared.cs

  Lines 153 to 154 in 172dd41

  	public Task<IEnumerable<Locale>> GetLocalesAsync() =>
  	PlatformGetLocalesAsync();

• maui/src/Essentials/src/TextToSpeech/TextToSpeech.uwp.cs

  Lines 17 to 18 in 172dd41

  	Task<IEnumerable<Locale>> PlatformGetLocalesAsync() =>
  	Task.FromResult(SpeechSynthesizer.AllVoices.Select(v => new Locale(v.Language, null, v.DisplayName, v.Id)));

One can compile this repository and then run the essentials sample project to debug this issue. It should be relatively straightforward.