It is a port of DMIX 1.1implemented in ParcPlace Smalltalk 2.3, running on Macintosh System 6.x operating systems, to VisualWorks 1.0, running on Macintosh Systems 7.1 and up. At times this is at the expense of details. Smaller enhacements include user preferences for graphic views, General-Midi editor and Multi, and some more.
Images are pretty compatible.
That was written with DMIX 1.x in mind. However, in most cases I think that things are pretty similar. As of this release I am no longer supporting DMIX 1.1. This will have little impact on the system, but allow the benefits of use on a PowerMac. A MIDI interface to Windows is currently under way.