[sdiy] Modifications to the mg-1]

[Florian Anwander]

Hi rob 

> How can I mod the detune so that it can be tuned in fifths, etc.  IE I want to expand the detune range.  
you simply may shorten the upper half of sw3 (The sync switch). In sync mode the
range is increased. This switch switches R29 parallel to R27, which decreases
the effective value of the R27 from 82k to about 27k.

The following changes I did add to the MG-1 of a fried:

added a ~470nF (don't remember the exact value) capacitor parallel to C25 and a
switch to chose between both values. (in the schemo near Modulationrate pot) ->
for hi frequency modulation.

changed R46/47 to a 47k pot -> adjustable pulswidth.

fed the envelope out over a 47k pot and 10k resistor to UA6 Pin 2. -> Envelope
modulated Pulswidth,

the same for LFO ot PWM

VCO2 out over a 47k Pot and 10k resistor to the filter cutoff mixing point
(connection of R111, R106 and R114). -> VCO to filtermodulation.


All values are told from the memory, I did this one year ago.

Florian
-- 
Florian Anwander                  |ConSol*  HP-Support
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