We need some good graphics for the main sampler screen. This is where you can do rudimentary editing of the samples that are played in the sequencer.
There are two screens. The main screen with the controls:

• Volume (this one may be changed later)
• Speed (Playspeed. The sample also pitches up or down)
• Filter (in the middle the sound is unchanged, away from center it engages either hi-pass

Currently find_template_match is too big and takes a lot of space in src/parse/check.c
It would be better to move it to its own file (e.g: src/parse/func_resolve_tmpl.c` with its siblings (ensure_tmpl, check_template_args and probably a few other).
Bonus points for splitting the functions and maybe defining a struct