Bug - NS4 OSC ENV AMT and Max ENV DECAY

[WannitBBBad]

Envelope Amount modulation fails to work correctly when the modulation envelope is set to minimum attack and maximum decay. This is a bug carried over from firmware version 1.34 to 1.44 which Nord claim to have fixed. They haven’t

For the modulation of an oscillator sync wave, the oscillator ENV AMT (envelope amount) control does not work for negative amounts when the envelope decay is set to INF (infinite) and the attack is set to minimum. It does work for positive amounts. This means if you want to use velocity to modulate the sync whilst keeping a constant envelope level, you can only do it in a positive direction. It should work in both directions because the control is supposed to be bi-polar.
This issue also effects oscillator pitch modulation where no values of the ENV AMT positive or negative will allow velocity to modulate the pitch when the modulation envelope is set to static (Attack 0, Decay Inf). There are several other oscillator modulations (e.g. phase) that do not work as they should.

I copied this from my post List of Nord Stage 4 known issues and bugs to allow more discussion of it.

Related to using ENV to PITCH, I found that the pitch of the ENV ATTACK starting point changes when moving from an ENV DECAY of 43s to infinity; it's a dramatic change actually. Using a negative ENV AMT, one would think that if it takes 43s for the pitch to move from the negative setting to 0, that switching to a DECAY of infinity would cause the pitch to never get to 0 and stay forever at the negative ENV AMT. However when DECAY is set at infinity, the starting pitch of the ATTACK is changed so that the final state of the attack is 0, rather than the negative ENV AMT. I have to play around with it further, however the sync operation you expect might work at DECAY=43s, and change quite differently at DECAY=Infinity given the implementation.

[WannitBBBad]

I played around with this further. I think my issue with ENV to PITCH is different than the one you noted, so I started a different post with a video here. For a sync wave with ENV to PITCH turned off, I found that the OSC ENV DECAY appears to work appropriately when moving from 43s to Infinity for both negative and positive ENV AMT settings. That is not true for the ENV to PITCH function. Take care.