Variable DURATION_OPTIONSConst

Available rhythmic duration options for pattern notes.

Uses standard music notation with the following suffixes:

• 'n' = normal (e.g., "4n" = quarter note)
• 'd' = dotted (adds 50% to duration, e.g., "4d" = dotted quarter)
• 't' = triplet (2/3 of normal duration, e.g., "4t" = quarter triplet)

Duration hierarchy from shortest to longest: 32nd notes → 16th notes → 8th notes → quarter notes → half notes → whole notes