Doepfer

Hi

Am 25.11.2016 um 16:33 schrieb diegora@free.fr [Doepfer_a100]:
> As for the A-143-1, the graphical marks show curved
> segments for Attack (rises faster in the second portion) and Decay
> (falls faster in the first portion). Especially the attack slope sounds
> more expressive and naturally picking than the one performed on an
> A-140. So I thought there must be a huge difference in the design
> between the two EG.
Nope. There isn't any difference in the characteristic of the 
attackphase. This is psychoacoustic: you hear what you want to hear.
Electrically the type of the envelope circuit (loading / unloading a 
capacitor) is completely the same on both modules.


> Another open matter to me is the possibility to take advantage of the
> velocity out on the Doepfer MIDI interfaces. Many users adopt the gate
> only to open the vca. I tried to fire velocity cv into the TipTop
> EZ4000 Deviater input with non enthusiastic results. I wonder if
> possible to have it to control a second cv input on a vca. It's not that
> common. Maybe the new Doepfer quad vca might respond properly to both
> gate and velocity, having 2 cv input jacks? Or would the exp character
> of an EG soon saturate into an exp VCA?
The correct patch of a velocity voltage for a velocity controlled 
signal-level is like this:

You need one exp-VCA and one lin-VCA

The VCO-signal is sent to the signal-in of the lin-VCA and the 
signal-out of the lin-VCA is the outputsignal

The envelope (any Doepfer envelope) is sent to the signal-in of the 
exp-VCA, the signal-out of this exp-VCA is sent to the control-input of 
the lin-VCA which carries the audio signal.

The velocity voltage from your interface is connected to the 
control-input of the exp-VCA which handles the level of the envelope.


Florian