Formant ADSR

[Carlos Vila Deutschbein]

oops, sorry. again:

I just finished building the ADSR module from the Formant Synthesizer (Got a
copy of the elector magazine, first edition). 

The case is that everything works fine except the Release stage.
Once the Gate input has dropped, the Envelope output does not drop to 0 V as
it should. Instead, it just drops to about 1.5 V.
I have checked that the voltage at the release pot is 0 V. 
I think that the problem is at the Sustain path, because: if I turn the
on-board variable resistor, the before mentioned voltage of 1,5 V can be
slightly modified about 0,3 V up and down.
Any clue or known problems?? Should I post the circuit?

Thanks!
-- 
==================================================
Carlos Vila Deutschbein       si04697 at salleURL.edu
Enginyeria La Salle     www.salleURL.edu/~si04697/
-------------- Barcelona, Spain ------------------