mwitmer

\version "2.12.3"

% vibrato.ly
% Author: Mark Witmer

% Sets the next trill spanner to draw a waveform with the provided wevelength
% and amplitudes. The waveform will go from one amplitude to the next in a
% linear fashion.
vibrato = #(define-music-function (parser location amplitudes wavelength) (list? number?) #{  
  \once \override TrillSpanner #'after-line-breaking = #(lambda (grob)