A4 Mk1 Overdrive Oddity

According to the manual the overdrive FX sits between the two filters and hence before the Amp envelope.

The odd thing is that the overdrive appears to bypass/control the attack portion of the Amp envelope, i.e. it has an instantaneous attack at max positions and more closely follows the Amp envelope as you wind it back. This is most noticeable when using long attacks.

Am I missing something or has this been discussed previously?

Overdrive change Amp attack behavior, for sure. I wouldn’t say bybass / control.
Better results for slow attack and max overdrive, with th 4-7 exponential envelopes.

Yes the exponential envelopes are less affected by the Overdrive.

I am just surprised that the Overdrive affects the Amp Envelope at all, particularly as the Overdrive is analogue and the Amp Envelope is digital.

the silence about buggy life of biolog4

Analog with digital control I guess. I agree it should be independent from Overdrive settings.