Speaking using alternative devices?

General
1

Hi,

I’m trying to use the speech engine (Mac OS X) to speak to a specific audio device (not necessarily the default one).
With sounds, that’s doable using the CoreAudio classes (using the MBS plugin), but I can’t find how to do that with speech, even the MBS plugin (NSSpeechSynthetizerMBS class) doesn’t seem to provide this.
I’m overlooking something?

2

The Mac speech API support the notion:

https://developer.apple.com/documentation/avfaudio/avspeechsynthesizer/1648692-outputchannels

…but the Xojo implementation is left as an exercise to the original poster. :wink:

3

Thank you. Time to dig into declares :wink:

4

Hi,

The NSSpeechSynthetizerMBS class doesn’t provide a handle to the synthetizer, so declares are helpless.
Christian, would it be possible to supply the handle (or better yet, to allow setting the device to speak to), please?

5

FWIW, NSSpeechSynthesizer does not seem to support device control, but AVSpeechSynthesizer appears to allow it. If MBS has a plug-in for that…

6

Hmm… I was afraid of that. Indeed, MBS has no AVSpeechSynthetizer and they’re not the same thing.

Thanks for your answer. I’ll remove the speech functionality in my app; it’s not mandatory.