The question might be better stated: "What machines can use the Sound
Manager?", since "snd" and "snth" resources are used by the Sound Manager.
Starting with the Macintosh Plus and continuing through the latest Macintosh,
all can use the Sound Manager. However, the Macintosh Plus and the Macintosh
SE have known difficulties with the Wave Table Synthesizer of the Sound Manager
because of anomalies in the System Software. Basic Note Commands and Sampled
Sound Synthesizer can be used from the Plus and the Macintosh SE.
The Macintosh II and later machines can use the Wave Table Synthesizer, the
Basic Note Commands, and the Sampled Sound Synthesizer.
For more in-depth discussion of these issues, see the Inside Macintosh
replacement chapter on the Sound Manager. This replacement chapter is posted
on AppleLink. Follow this path to locate the document:
Developer Services:Macintosh Developer Technical Support:
Interim Technical Documents:Sound Manager (Microsoft Word)
It's a Word 3.02 document which discusses the use of the Sound Manager in
Macintosh Plus systems and later.