i’m starting to get it, the track "banks" (i don’t know the name of that) shouldn’t be '00' (and that isn't there in the documentation) - anyway, i tried to start copying by hand some VortexTracker documents content i had around (some converted stuff from ay-3-8910 and sn76489 vgm files! ;D - at least for now, for testing ) and it seems to work (only seems to be counterproductive having to retype everything...)