Avalon ST looks good except there is no driver written for my S612 Sampler, furthest back they go is s700, And i believe the sampler rom is v1.0. Apperently on this unit there was a 3rd party v1.3 that allowed for six samples, currently this machine only does one shots. Softsynth SA( i believe a latter version) can be found, but it needs a special sound accelerator card to work in a Mac. But im hoping there is a 1986 version that works in the ATARI.
This thing has way more character than any plug-in I've used.