There are various effects that can be applied to a beat. All beat
effects are specified in braces after the beat.
Please find the list of support effects in the example below.
Tremolo / Whammy Bar
The tremolo/whammy bar effect is a bit more complex than the others.
You can specify a number of values which are evenly distributed over the
time when the note is played. The values indicate the number of quarter notes
increased or decreased on playing.
tb (value1 value2 ...)