I don't think what you want was ever published.
The restoration of the internal memory from the cassette isn't for everybody, even at the time when everybody owned cassette machines in new condition.
I've never had problems myself, but most people express frustration at this method.
The phase inversion is a common problem, as is too low an output level.
A Radio shack mono machine with a loudspeaker level output was the recommended machine.
I never saw one of those myself, and I eventually got a Sony Pro Walkman which worked with no trouble.
There is an alternative.
Do you have any software that would enable a sysex dump
Obviously a MIDI interface is required too, but the software is crucial.
I have a number of patch dumps from this synth in a number of formats.
I believe sysex dumps are still available on some websites, if not I can look then out.
I'm not near my Matrix 6 so I can't offer a blow by blow account of how you do this, but I'm pretty sure the manual description is accurate.
From:
sloppyjoe6412 <sloppyjoe6412@...>
To:
oberheim@yahoogroups.com
Sent:
Monday, 16 July 2012, 22:03
Subject:
[oberheim] Matrix 6 presets
Hi, I own a Matrix 6 with a blank memory. I have the original cassette tape but every attempt I made to load the presets failed. Also failed at trying to send any patch data / commands via laptop. And since I'm neither good nor patient at experimenting with so many numbered parameters (it's easier playing with a few knobs as in my P600), my Matrix 6 is essentially collecting dust.
In summary, does anybody have a PRINTED list of parameters of some good or at least well known patches, something I can use as a starting point to tweak things by myself
I understand it's a slow and backwards way to do patch programming, but the alternative is to not use the synth at all.
Thanks!