Comment #38 on issue 687 by [email protected]: Enhancement: inequal MIDI quantization of equal durations (swing, rubato)
http://code.google.com/p/lilypond/issues/detail?id=687
David, regarding comment #35: Yes, this works by applying ly:compress-music with appropriately calculated factors, so \tripletFeel 8 { c8 c } results in something like { c8*4/3 c8*2/3 }.
Adam, I'll try, but '\version "2.4.2"'? Well, let's see how good convert-ly can be.
