Their is alot of mention about vortex tracker in AYT thread and have suggested it move to a different thread, like here
Anyway, i do remember something very neat about Vortex compiled tunes was that to further save bytes, the Ornaments, Volumes and Effects would only be specified in a note event if they differed from the last. This simple rule cuts out so much wasted memory
So the Vortex format goes by the idea that all information (about the note about to be played in the pattern) is provided prior to the note being specified, since the note itself is the final byte before it is played.
So a typical pattern might contain..
Effect 01
Ornament 03
Volume 10
Note C-4
Rest 3 rows
Ornament 02
Note C-4
Because no Effect or Volume was specified in the second note it would be taken from the previous so the second note would play Effect 01 and Volume 10.
btw, i implemented this into the AYT compiler
Chema, if you manage to work out the proper Vortex PT3 format, please doc here or somewhere and let me have them, then i can try to write an importer into AYT

Eeek, actually come to think about it, i'm not so sure it would work since AYT only supports one effect type, where as vortex has effects(called samples)
and ornaments but i guess it could still be achieved with less accuracy
