[LAD] DX7 (was Re: On the last eve of the year)

[Ralf Mardorf]

On Fri, 2010-12-31 at 18:11 +0100, Nick Copeland wrote:
> > OT: I never noticed any difference for the sound quality, of
> different
> > versions of the Prophet 5, but I guess everybody heard about stable
> or
> > unstable tuning for different versions of the Mini Moog ;).
> Revisions
> > could have different qualities. [OT end]
> 
> There were two major releases of the Prophet-5, one with Curtis chips
> and
> later one with SSM chips. The Curtis had rather wild temperature
> senstivity 
> and so was replaced. Anybody who has used both found the newer models 
> to sound a lot thinner and some would prefer the
> sensitivity/unreliability of 
> the former to get the sound quality.

I know two releases with a little bit different design for the
potentiometers in the case.

> 
> The MiniMoog is a bit more esoteric, they did not used anybodies
> chipsets
> but mostly discrete components. Legend has it they the board layout
> was
> changed at some point and even though the design was the same those
> in 
> the know did not appreciate the new sound.
> 
> I am pretty sure the Oberheim went through the same issues as SC. The
> big Rolands are a separate issue - I think they used there own
> chipsets but
> I could be a bit wide of the mark.
> 
> Kind regards, nick.

I guess my Oberheim Matrix-1000 will use CME micro chips and I guess a
Roland Juno-106 will use CME too and perhaps SC and Moog (at least for
later synth) did use those chips too.

To be continued

Ralf