Doepfer

Hi folks. I have a mystery I need help with.

Every time I play my modular, the first note is about 3db quieter 
than the all the subsequent notes I play.

The input is midi into the A-190-1
The trigger comes out of there into an A-140 envelope generator
That triggers an A-132-3 dual VCA set to "Exp".
The audio in is directly from an oscillator

I first noticed it when I was using an Intelijel Dual VCA so I 
switched to the Doepfer. Same problem with both.

I've now tried all 3 of my A-140s and also my A-143-2 quad 
Envelope  Generator. Same problem  occurs with them all.

Looking at the recorded waveform, it looks like the first note I 
play, the envelope has the decay time set to close to zero and the 
sustain level set to about 6. Then all the next notes, the sustain is 
back up to 10. But in all cases I have the sustain level set to 10 
all the time.

Also, this only happens when the time switch on the envelope 
generator is set to M or H. When it's set to L the output is much 
higher (causing the audio output of the VCA to be louder) but there 
is no difference between notes played.

HOWEVER... when I take all the same sources and plug them into an 
A-131 exp VCA it works exactly as expected. Every note is the exact 
same volume!

Any idea why the dual VCAs are behaving this way?

Thanks!
Scott