Good jorb :derp:
https://www.mmlshare.com/tracks/view/508

whoops I did browse the mmlshare site and got the macro syntax from there, and I naively assumed they worked the same way as FT arpeggio macros, but I did not test it out (´・ω・｀)

It should be {0 | 12 0 -12} right?

Oh, commas do work.

They're just wasteful so why bother.