X-DST/REG_FILT
Arguments: exp &optional c-imp vmapupper vmaplower vmapinternal cmapupper cmaplower cmapinternal [generic-function]
Filtering of numbered point distances within a zone. Gives patterns that should hold for the horizontal distances
between points falling within a given zone.
For example, interpreting objects aschords, the expression (0_6 (36 48 (u (not (or (2 2) (4 4)))))) constraints the first seven chords
so that in the upper voice, within the octave from 36 up to 48, there should be no sequence of two consecutive major
seconds or major thirds
so that in the upper voice, within the octave from 36 up to 48, there should be no sequence of two consecutive major
seconds or major thirds
