viola = \new Voice \relative c' {
\set Staff.midiInstrument = "viola"
\set Staff.midiPanPosition = 0.33
\time 3/4
%\clef alto
\clef "treble_8"

% Equidistant. Bar  1
as2  as4~as   as2
% Bar 3
g'4   f  e  c  a e  r2. r2. \break

% Pythagoras.  Bar  7
asp2 asp4~asp asp2
% Bar 9
gp'4  fp ep cp a ep r2. r2. \break

% Aristoxenos. Bar 13
asa2 asa4~asa asa2
% Bar 15
ga'4  fa ea ca a ea r2. r2. \break

% Ad hoc.      Bar 19. Complicate.
ash2 ash4~ash ash2
% Bar 21
ghl'4 fhl eh chl a eh r2. r2. \break

% Ad hoc.      Bar 25. Plus simple.
ash2 ash4~ash ash2
% Bar 27
gh'4  fh  eh ch  a eh r2. r2. \break

% Ad hoc.      Bar 25. Sempre 19:10
ash2 ash4~ash ash2
% Bar 27
gh'4  fh  eh ch  a eh r2. r2. \break
}