Issue 1586 in lilypond: midi cresc happens instantly

[lilypond]

Status: Accepted
Owner: ----
Labels: Priority-Critical Type-Defect

New issue 1586 by percival.music.ca: midi cresc happens instantly
http://code.google.com/p/lilypond/issues/detail?id=1586

% the MIDI note velocities are 53 90 90 90 ; that doesn't look
% like a crescendo to me.
%
% there is an unverified claim that this worked in 2.13.52.

\version "2.13.56"
\score {
  {
    c4\ppp d\< e f\!
  }
  \midi {}
  \layout{}
}