MOTM

At 7:41 AM -0500 2002/05/09, Paul Schreiber wrote:
>I suspect that this oddness is when the '800 is used with GATE only.
>
>It probably has to do with the attack times less than the internal 
>trigger pulse time.

That seems to be the ticket. Once I increase A from 0.0 to 2.0 then 
the problem goes away (i.e. the envelope instantly reaches 5 volts 
and stays there, it no longer decays slowly up to 5 volts).

>Also, I can see that if attack is very short (say 0) and decay is 
>long (say 4 or more) when
>sustain is at 10 it acts strangely. Think about it: what does this 
>setting mean? How can you
>"decay" when the sustain is at max? Where do you "decay" to? I 
>suppose it should just sit at the
>sustain setting (~+5V) and wait for GATE to drop, going into the 
>release phase.

That's exactly what I would expect it to do: decay from the attack 
peak of 5 volts down to the sustain level of 5 volts, a simple organ 
type of envelope. I wouldn't expect the envelope to slowly rise from 
4 volts to 5 volts while sustaining.

>But it may not.
>However, I don't forsee a reason to redesign. It *is* a cheap, simple circuit.

Consider it a unique envelope contour specific to the MOTM line.