- adds quarter_notes_per_minute(), note_divisions_per_minute (double)
pulses_per_minute() and frames_per_quarter_note()
- this should be a no-op except for the use of tempo by
the vst callback which definitely uses quarter notes per minute.
- the XML node for TempoSection named 'beats-per-minute'
has been renamed.
- moves frame rounding up to TempoMap, which is needed
in order to calculate pulse distance without frame rounding.
- the time unit for tempo is still minute, but this now also
applies to meter sections. (new audio locked meter sections no
longer require a frame position).
- there is no longer a discontinuity
in the pulse for audio-locked meter/tempi.
- temporarily add debugging output in Region::set_position()
to test for region beat not matching region frame.
- after reports that a tempo with non-4.0 note type
would produce a ramp in the preceding section, an incorrect
assumption was made leading to a bogus 'fix' that redefined
Tempo's pulses_per_minute().
the real fix was simple:
the ramp's function constant was calculated using the note type
of the proceding tempo rather than the current one.
- this patch reverts e82482e8e9 and a4d67279e0
and maintains the old definition of Tempo::pulses_per_minute()
