Unknown7 Parameter - Filter Latch-up

[mungewell]

https://youtu.be/OakcXaoPdFA

Demo of the filter latching up after the 'unknown7' parameter is set. This only happens on some patches, here I modified Synthmania's "Electro_Sequence_unknown7.unosyp" which uses long filter release and maximum filter env amount.

Problem occurs if a note is longer that 1 beat (as is set in step 13 of sequencer). It can also be triggered by a long press on the keyboard,

I don't believe that this is intended, just a glitch... but hints as to what 'unknown7' affects.