Found via `codespell -q 3 -S *.po,./share/patchfiles,./libs -L ba,buss,busses,doubleclick,hsi,ontop,ro,seh,siz,sord,sur,te,trough,ue`
Follow-up to 364f2f078
* relax octave requirement, allow the scale
to repeat at intervals other than 1200 cents
* fix frequency alignment of root note
to use the given scale (not equal temperament)