For version 3.0.0.12:
To make your existing game support speech, do the following:
- open your game, and go to Game->Version Detection
- Set Audio volume name to "aud/sfx"
- Set Audio36 map format to "Sync map late"
- Check "Supports message audio"
- Click on Reload game
- Go to the Messages tab and open message 110
- Click on an entry in there and use the record button to assign a wav to it (if you have a microphone), or "browse" for a wav file to assign to it.
- Save the message 100 resource
- Click the "repackage audio files" button at the top of the message editor (or just run your game, which will do a repackage automatically)
- Now you should be able to close your game and re-open it and it will be detected as a game that supports message audio (if you close your game before completing all these steps, you'll have to start over at step 1 again).
Finally, you need to replace Talker.sc and Messager.sc with those from the latest SCI 1.1 template game.
Then, in your game's init method in main.sc, where it says:
= global90 $0001
change this to
= global90 $0003
(changing it to $0002 means speech only, $0003 means both speech and text)
Recompile things and you should be good to go.