drumsynth inconsistent pitch and amp envelopes behavior

[crshrprt]

Describe the bug

drumsynth inconsistent pitch and amp envelopes between consecutive notes

Build info

Linux
Debian Sid
Latest Bespoke Nightly

Steps To Reproduce

Play consecutive notes on any of the drumsynth oscillators. The sound between consecutive notes is inconsistent.
The problem is very noticeable in short amp attack sounds, short pitch down envelope sounds like kicks or snares.

Expected vs. actual behavior

Consecutive notes should trigger the exact same sound as the notes before.

In the actual behavior there seems to be two problems:

1. Pitch Envelope is not consistent, waveform ends sometimes positive and sometimes negative
2. Amp Envelope is very inconsistent, sometimes "eating" much, if not all, the attack part of the waveform

Test patch:
DrumsynthTest.bsk.zip