[sdiy] ve a GOOD Matrix 1000 schematic ???

[harrybissell]

Hi Karl

yeah I think you have it correct.  I was studying the difference to
see which synth would be a better candidate for major surgery.

In the process, I found someone who said the difference was in the
3396 (wide body vs narrow body) filters... and invited a comparison
of the high frequency range, especially with high resonance settings...

... which would point out the weakness of the Matrix 1000 due to
lack of an HF-VCO

Hmmmm....

(thanks for the confirmation)

H^) harry

Karl Dalen wrote:

> About the M1000/M6, the Matrix 6 had 3 HFO's a
> reason why one could split its voices into 2/4 or 4/2.
>
> In the M1000 there are five 82C54, four are used
> for the 6 voices, (2DCO's each) the fifht 82C54
> seams to be used as (brutal guess)system clock
> timing.
>
> The 82C54 CLK input seams to be the CPU (68B09) E clock. (the E clk are
> phase 2 of CPU)  Im not 100% shure but in the 6809 the E pin are defined
> as async clock "input". And in the 68B09 its an output!? Hmm, but using
> the gudiance of the ARP Chroma schematics, wich uses the 68B09 i hold my
> thumbs and since the M1000 CPU clk are 8Mhz then 8/4 gives E of 2Mhz
> wich would give a lowest note of 30Hz from the 82C54! (30,86Hz =B0)
>
> My M1000 shemos are incomplete so its difficult to know wether there
> is a prescaler between the E and 82C54? (i have some fade memory of
> a two phase clk of the 68B09 to do the 6502 memory trick).
>
> Due to the "guessed" lack of HFO the M1000 would infact have much
> worser high freq perfomance compared to the M6! But it would be as
> the M6 splendid at bass range! Is there any M1000 user here who
> could say how the M1000 behaves at high octave range?
>
> I might be completely wrong but whats your guess about this?
>
> Reg
> KD
>
>  --- harrybissell <harrybissell at prodigy.net> skrev: > I have a PDF and
> some JPGs from the web... but I don't see the
> > HF-VCO like the Matrix 6R.   Is a page missing, or cut off ??? or are
> > they
> > doing it essentially a different way ?  I see point <E> which should GO
> > to this
> > clock, but can't find the source
> >
> > Any assistance ???
> >
> > H^) harry
> >
>
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