The availability of tapes is a big problem. I know there are a few hundred dead drives out there. A good tech I know said they are now not repairable. I am not sure what failed. The motor on mine worked, but could not record.
I just heard from a tech who used to work for the company who made the sequencer back in the day and he said he was pretty sure the data format is Manchester.
The functions of the tape deck were fairly simple. Each save took up a whole side of tape, so not much searching for data etc was used. From the schematics and service manuals I think I should be able to figure out the logic controls and what logic should be expected.
Here is an extract from the manual which describes the functions of the tape deck. I should have included this earlier in the thread!
Pages from Prophet-10 Synthesizer Operation Manual.pdf (76.4 KB)