[Impromptu] Speech as Audio Unit?

[Glen F]

Hi there -- can anyone help me get speech synthesis working as an Audio
Unit?  I did it "without", but discovered it was not recorded when using
au:start-audio-capture...therefore, I want to set it up using an AU.
Seems there are a few options, but the most tantalizing is the speech AU in
OS X 10.5...(don't need to use NetReceive)  But I'm not sure how to get it
to talk...I need to get the relevant "channel", but am not familiar enough
with this stuff to know exactly how...

(define speech (au:make-node "augn" "ttsp" "appl"))

(define reverb (au:make-node "aufx" "mrev" "appl"))

(au:connect-node speech 0 reverb 0)

(au:connect-node reverb 0 *au:output-node* 0)

(au:update-graph)

(au:print-graph)


(define voice1 (au:get-speech-channel)) ; this is wrong, I think...?

(au:speak (now) voice1 "Ree-verby!") ; seems to use a non-AU voice channel

I think I'd need to use au:get-property on property 3331
(kAudioUnitProperty_SpeechChannel), but am not sure exactly how to set
things up using NSMutableData and all that...or even if that's the right
approach.  Or do I need to use the system call "say -n" and NetReceive AUnit
to get this going?

Thanks for any tips,
Glen.
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