Upwards envelopes make muting a subpattern impossible

[coffeevalenbat]

Due to the way Cxy is currently handled, once an envelope has been set by an instrument/the main pattern, it's direction can't be changed back from 1 (up) to 0 (down) until a new instrument trigger happens, in ISSO's WIP manual, the reccomended way to kill an instrument's subpattern is using C00, but this coupled with a previous envelope with an upwards direction only makes the envelope reset to volume 0 and crawl up to volume F quickly, a workaround could be using Exx from the main pattern but that'd coggle up the effect row.

[SuperDisk]

Yup, the way Cxy is handled right now is bugged and will be fixed.