Add brushes to alphaTex

[Danielku15]

Brush strokes can currently not be defined in alphaTex. This should be possible as beat effect.
Proposed syntax:
bu {duration} for brush up
bd {duration} for brush down
au {duration} for arpeggio up
ad {duration} for arpeggio down

The duration is in midi ticks optional and defaults to some calculated value based on the beat duration.

[goodgame365]

Has it come true,NOW?

[Danielku15]

@goodgame365 If you have a question, can you please try to rephrase it to make it more understandable?

[jonaro00]

To clarify: Would the syntax be (0.1 1.2 0.3 2.4 3.5){ch "C" bd 60} for example?

[Danielku15]

@jonaro00 Jup, something like this would be the goal.