Note and rest values are expressed in an internal unit, to express their mutual relationships and to make them independent from actual tempo. This unit is used by the following object properties:

Ms::PluginAPI::PluginAPI::division (defines a number of ticks per quarter note)
Ms::PluginAPI::Segment::tick
Other properties (to be added to this list)

Tick Lengths

All tick lengths in this table are defined through the division property. Raw numeric values are better to be avoided.

Duration	Ticks value
whole note (semibreve)	`4 * division`
double-dotted half note	`3.5 * division`
dotted half note	`3 * division`
triplet whole note (1/3 of breve)	`8 * division / 3`
half note (minim)	`2 * division`
double-dotted crochet	`1.75 * division`
dotted crochet	`1.5 * division`
triplet half note (1/3 of semibreve)	`4 * division / 3`
1/4 note (crochet)	`division`
double-dotted quaver	`0.875 * division`
dotted quaver	`0.75 * division`
triplet crochet (1/3 of minim)	`2 * division / 3`
1/8 note (quaver)	`division / 2`
double-dotted semiquaver	`0.4375 * division`
dotted semiquaver	`0.375 * division`
triplet quaver (1/3 of crochet)	`division / 3`
1/16 note (semiquaver)	`division / 4`
double-dotted demi-semiquaver	`0.21875 * division`
dotted demi-semiquaver	`0.1875 * division`
triplet semiquaver (1/3 of quaver)	`division / 6`
1/32 note (demi-semiquaver)	`division / 8`
dotted hemi-demi-semiquaver	`0.09375 * division`
triplet demi-semiquaver (1/3 of semiquaver)	`division / 12`
1/64 note (hemi-demi-semiquaver)	`division / 16`