Gotcha. Is there no way to "track the whole cycle"? I am assuming that
the envelope is just a filter being fed by constant current, so maybe
scaling that could work... But that's just my imagination
D.
2010/7/26 <
jhaible@...>:
> You could certainly track the decay time, or the reciprocal of the decay time,
> precisely with 1V/octave. But you'd never get the whole cycle to be a precisely
> tracking oscillator, simply because the other times (attack, on, off) are never
> exactly zero. To make matters worse (in terms of tracking), they partly depend
> on each other. This, of course, is part of the charm of the VCS3 trapezoid, and
> it took some effort to cover this realistically without copying the actual
> circuit. :)
>
> JH.
>
>> With just the decay under voltage control, will it be possible for the
>> generated wave to track the voltage like it's a normal oscillator?
>>
>> Regarding demos, it would be cool if you could show one where the vca
>> is really pushed into coloration :)
>>
>> The sweeps sounded real cool in that mp3 :)
>>
>> I agree, it definitely would be cool to have VC of all parameters. In
>> that case you could do several nice things:
>> route one voltage to two parameters, one positively and one
>> negatively, to change the pulse width or shape without changing the
>> pitch
>> route one voltage to all parameters, to simply change the pitch
>> route one voltage to only several parameters changing the pitch and
>> use a comparator to start sending voltage to other parameters starting
>> some higher pitch. then you get normally tracking pitch but also you
>> get nice timbral change
>>
>> Cheers,
>> D.
>>
>> On Mon, Jul 26, 2010 at 07:36, JH. <jhaible@...> wrote:
>> >
>> >> I would think that since Analogue Systems makes their own EMS licensed
>> >> Euro module that one would want to go further than just a clone.
>> >>
>> >> Firstly I would think that the vc decay being tweaked to respond to 1v/
>> >> oct would add functionality. Also something like the trapezoid polarity
>> mod
>> >> would be good to have.
>> >
>> > Pos and neg polarity is a must, of course.
>> > 1V/Oct (or any other user-selectable) response of the decay time also.
>> >
>> >> The thing I've always wanted is VC on all the parameters, not just
>> decay.
>> >> Obviously that would alter any tracking one might achieve with just the
>> >> decay but it would make for some interesting signals.
>> >
>> > I'm afraid it will only be VC Decay, and manually controlled Attack, On,
>> and
>> > Off Time.
>> > Even though my implementation is different from EMS's - to avoid problems
>> > with Ge diodes or leakage and SOT parts - that unique interaction of the 4
>> > time parameters, and the natural feel of the Off-Time knob turning the
>> > repetition off towards the cw end, require it to be done that way.
>> >
>> > BTW, there will be an ordinary Gate input of course, positive Voltage
>> > trigger and negative Moog/Korg Switch trigger.
>> > Maybe I'll put in an "audio trigger" also, such that the trapezoid can be
>> > started by a certain signal level, or sync'ed to the beat.
>> >
>> > JH.
>> >
>>
>>
>
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