Doepfer

Ok that explains why patching to end of release wouldn't work as
expected, 

but how come then that patching with 'end of decay' I still seem to
get the release of the envelope on every repeat? not complaining thats
the behavior I want, but just wondering

Carlos


--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
>
> > I got this module yesterday and is quite everything I expected. Great
> > to get the eg's auto triggering each other and create interesting
> > patterns.
> >
> > Question though, how come to get each of the adsr to constantly
> > re-trigger itself it has to be patched to 'end of decay'? I thought it
> > would work at 'end of release' since thats the last part of the
> > envelope no?
> 
> I remember that we had the same "problem" in the company during the
> development of the A-143-2. Let me try to explain it:
> The 'end of release' output is generated by a comparator that
compares the
> ADSR output to a small voltage (about 100mV). As soon as the ADSR output
> becomes lower than this voltage the 'end of release' output turns
'high'.
> And the other way round: as soon as the ADSR output becomes higher
than this
> voltage the 'end of release' output turns back to low level.
> 
> If the 'end of release' output is connected to the gate input this
happens:
> As soon as the ADSR output becomes lower than about 100mV the gate turns
> high and the attack phase begins for a very short time. This time is
very
> short because now the ADSR output voltage increases and reaches the
100mV
> very soon (probably less than a millisecond) which causes the 'end of
> release' output to turn low which immediately ends the attack phase.
With an
> oscilloscope you would see a signal that swings very fast around the
100mV
> threshold level of the 'end of release' circuit.
> 
> If you want to use the 'end of release' output to trigger the gate
you need
> a circuit that elongates the length of the 'end of release' signal. For
> example the A-162 trigger delay (with Delay = Zero) can do this job. The
> length of the A-162 defines how long the signal remains high. This time
> corresponds to the setting of the attack control of the A-143-2.
> 
> I know the explanation is very technical but I hope you will
understand the
> behaviour of this patch.
> 
> Best wishes
> Dieter Doepfer
>