MOTM

While scanning through the list archives I noticed a certain lament 
that the MOTM 800 EG does not allow voltage control over the ADR 
times. Although that would be a useful feature, I am much more 
curious as to how one would add an initial delay that would change 
the 800's ADSR envelope into a DADSR (delay, attack, sustain, 
release). A gate delay circuit is not difficult to build, but 
creating a one off panel is a lot of work (for me) for such a simple 
circuit.

I figure a delayed ADSR can be constructed by cascading two 800s. The 
first 800 accepts the keyboard gate signal, the + output of this 800 
feeds into the gate of the second 800. The second 800 will not fire 
until the Attack phase of the first 800 has passed the gate 
threshold, therefore the delay time of the second 800 is set by the 
Attack time of the first 800. I don't have any 800s to test this 
theory so I'm hoping someone can answer these questions:

1. At what voltage threshold on the gate input does the 800 fire?
2. What is the maximum delay time that can be achieved using this 
scheme? It would depend on how slow the Attack time can be set and on 
the answer to question #1.
3. Is there some other way of creating a gate delay without resorting 
to custom modules?


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Scott Juskiw                                            scott@...

scott@... writes:

>>I figure a delayed ADSR can be constructed by cascading two 800s. The first 
800 accepts the keyboard gate signal, the + output of this 800 feeds into the 
gate of the second 800.<<

That's clever thinking.

>>1. At what voltage threshold on the gate input does the 800 fire?<<

That may be different on everybody's modules, but perhaps the VC-Router 
module could be used to set the threshold to whatever you want.

>>3. Is there some other way of creating a gate delay without resorting to 
custom modules?<<

You could buy an Encore Electronics Universal Event Generator (it's MOTM 
format).  Delay on the MOTM-800 isn't so important to me anymore since I 
bought a UEG.

-Elhardt