windowparams: track (& global ?) scope

[andr-ew]

when in track scope, do not retrigger loops each time a preset is selected

[andr-ew]

ui/norns, tape page:

• K1 + E2/K3 sets the shared options for win/len (w/l)
• K1 + E3/K3 sets the options for loop

[andr-ew]

global scope: shared start & end vals, punch-in punches in all tracks

globaly scope window & rate (w/ different buffers) for op1-esque four-track behavior

[andr-ew]

subtle idea: when window is in global scope it would be cool if min buffer size == max buffer size. this would make it feel even more like the op1 tape. leaving notes in #38

[andr-ew]

possible: in global window scope, looping is disabled & position is retriggered in the lua layer (factoring in differing rates) a-la rpls

alternate: keep looping on, but re-trigger all tracks at the rate of the slowest loop. this allows tracks to run out of sync when changing rates, but eventually fall back into sync

[andr-ew]

idea: separate scopes for start & len

consequence: no place to edit loop via the main interface. opportunity: give up on trying to fit all the scope assignment options in the main interface & re-separate the scope assignments for rate controls

[andr-ew]

possible: in global window scope, looping is disabled & position is retriggered in the lua layer (factoring in differing rates) a-la rpls

when length is global, let's do this – disable looping and retrigger from lua (at the rate of 1/(length * rate))

two applications:

• synced loops (with rate-based multiply/divide per-track)
• morphagene-morph-style "taps" when start is spread and tracks are pulling from the same buffer