Mac OS 9 Lives
Mac OS 9 Discussion => Mac OS 9, Hacks & Upgrades => Topic started by: jjuran on January 11, 2026, 09:22:46 PM
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I've made a reimplementation of the Sound Driver API via the Sound Manager, called Legacynth.
A number of old games that use the Sound Driver are still able to run in Mac OS 9, but with no sound — there's a .Sound driver on PPC and AV Macs, but it doesn't produce audio. Legacynth intercepts the I/O calls to the driver and translates them into Sound Manager calls. It supports all three synthesizer modes (free-form, square-wave, and four-tone) and comes with a test program for each one so you can easily verify that it works.
You can download it here: https://www.macrelics.com/legacynth/
There's also AGPL-licensed source code in https://github.com/jjuran/metamage_1 under apps/mac/Legacynth/.
I'm interested in any and all feedback. Beyond making it work, I put some real effort into making it usable, and I hope it shows.