Vintage Synth Repair

Hi All

I know that this is not an Atari related group, but this group covers
a lot of different backgrounds and experiences and so I hoping someone
on the list might have some information.

Since an ADAP SoundRack has come up for sale on the Atari-MIDI group,
I'm wondering if anyone has any data on the various units, versions,
and/or options that were sold, and what software is needed to use
them?  So far I have had little success get anything useful from
Google.  Any suggestions as to where I might look or who I might ask?

Larry T.