Had an idea for a new envelope op that I posted to the github forum, after posting it decided I might be able to put it together with some ops. Worked out but all values from the envelope are linear from point to point.

This patch allows a user to define a bunch of values inside of array and then interpolate between all values with a fixed duration.

The area with Fake envelope is where everything occurs, the rest is just for visualizing the values of the array at the current time.