may be entered with a MIDI instrument. Bring to front either the "Grammar" or
"Alphabet" window and select "Load time-patter
in the "File" menu. The rest is self-explanatory: BP2 captures notes played on
the MIDI input and stores their relative durations.
that it is necessary to play an extra note at the end because durations are
measured on the basis of NoteOn messages. NoteOff's are ignored. It is
therefore evident that
may be assigned a variable. BP2 suggests labels "Tp1", "Tp2", etc. and inserts
automatically a rule rewriting "Tp..." as the sequence of durations entered.
used for defining time-patterns must be played in sequence: playing chords
would mess durations because simultaneous events actually do not produce
simultaneous MIDI codes. You may for instance play the Mozart piece "with one
finger" (plus the extra note at the end) and store the 96 beats obtained as
"Tp1". All variations will then be played exactly with the same expressive (or
dull) duration ratios. You may also play parts of the piece several times and
store them as optional time-patterns randomly selected by the grammar. With
context-sensitive or programmed grammars (see §11) musically significant
effects could be obtained.