@DanH @Christoph-Hart the flex envelope is essentially missing the spline XY handles to create an envelope in the first place.
From a UX design standpoint:
01 Base level (priority): conventional ADSR controls — Unconstrained handles for Attack, Decay, Sustain, Release, no dials required, easy to read/adjust.
02 Secondary / advanced: spline-shaped ADSR curves with Bezier handles for fine-tuning shape.
Current Issue:
The existing flex envelope design inverts this hierarchy, prioritizing Bezier-based curve editing as the default interaction. (Which can feel slow and constrained for user since base level controls are missing.)

Initial envelope discussion:
https://forum.hise.audio/topic/11509/custom-envelope/19?_=1754988313518
