The last released versions is called 4.2. This release contains an installer application which installs a particular release of Apple's Midi Manager. It also includes the latest Sample Freq. Conv. (1.0.2), and Fast Time Scale 1.0.6. These need a MacMix accelerator board. Note that this version of Fast Time Scale does not work with MacMix version 3.2.1.
The most stable MacMix version is probably 3.2.1. I have been able to make Sample Freq. Conv 1.0.2 work with 3.2.1. MacMix quits with a type 1 error when I try to run Time Scale operations.
Macintosh Accelerators boards with 68040's on them are available cheaply, around $300. MacMix won't take advantage of the optional floating point accelerator available on some of these boards so it probably is not worth the extra $100.
As for disk performance, your best start is to get a modern SCSI-2 disk drive compatible with a new Dyaxis ROM. One of the later model Quadra's does faster disk I/O than an older machine such as a Macintosh IIci.
Alan Goldwater reports good luck (especially with Fast Mix) with the disk cache replacement feature of the Connectix Speed Doubler product which costs around $55.
I am currently testing different configurations. Please let me know your MacMix version number, Macintosh Model number and OS release number so I can develop the list of known good configurations below:
Apparently MacMix works on PowerPC's, but the plug-in operations fail.
Adrian, November 1996