Delphi SAPI Text-To-Speech
- by Andreas Rejbrand
First of all: this is not a duplicate of http://stackoverflow.com/questions/1021490/delphi-and-sapi. I have a specific problem with the "SAPI in Delphi" subject.
I have used the excellent Import Type-Library guide in Delphi 2009 to get a TSpVoice component in the component palette. This works great. With
var
SpVoice: TSpVoice;
I can write
SpVoice.Speak('This is an example.', 1);
to get asynchronous audio output.
First question
According to the documentation, I would be able to write
SpVoice.Speak('This is an example.', 0);
to get synchronous audio output, but instead I get an EZeroDivide exception. Why's that?
Second question
But more importantly, I would like to be able to create the SpVoice object dynamically (I think this is called to "late-bound" the SpVoice object), partly because only a very small fraction of all sessions of my app will use it, and partly because I do not want to assume the existance of the SAPI server on the end-user's system.
To this end, I tried
procedure TForm1.FormClick(Sender: TObject);
var
SpVoice: Variant;
begin
SpVoice := CreateOleObject('SAPI.SpVoice');
SpVoice.Speak('this is a test', 0);
end;
which apparently does nothing at all! (Replacing the 0 with 1 gives me the EZeroDivide exception.)
Disclaimer
I am rather new to COM/OLE automation. I am sorry for any ignorance or stupidity shown by me in this post...
