[WIP] Softcut output filters

[catfact]

added output filter to each softcut voice. the DSP is basically a one-line change, adding commands, OSC and lua is a lot more.

note that this is a breaking change to OSC command list and lua API! the input and output filters need to be differentiated; i replaced filter_ with pre_filter and post_filter

this is completely untested! have not even cleaned up formatting! putting it up just in case anyone has time to get to it before i do (which will be soon but probably not today)

[tehn]

i can help on the c/lua glue!

[catfact]

the new parameters use _norns.cut_param(), so i don't think new c/lua glue is required, and i updated softcut.lua

the main other thing that needs updating is scripts / libraries that call softcut.filter_xyz

[tehn]

aha, i see what you mean. this seems done then? just needs doc updates?

breaking change is the addition of pre_ to the existing filters, correct? pretty sure hardly any scripts use them currently, but good to know.

will test. excited to hear this.

side note: i should implement a softcut_defaults OSC message that resets crone instead of sending 400 individual OSC messages...

[catfact]

breaking change is the addition of pre_ to the existing filters, correct?

yes

this seems done then? just needs doc updates?

it needs testing. i give it a 15% chance of being completely broken right now. will try on hardware ASAP