Sing free/Scales

Which MIDI instruments are best for intonation studies?
I'm not sure but the following seem to be pretty good: \set Staff.midiInstrument = #"reed organ" % #"lead 2"

Major Sixth M6
%DEF \language "english" \relative c\transpose c c'' {\set Staff.midiInstrument = #"reed organ" \key c\major \time 4/4 \tempo "" 4 = 80 %END Free singing lessons/Major sixth M6

Four octave scale (labeled)
This code was not written to facilitate easy transposition. Instead use the unlabeled version.


 * 1) Numbered list item

Four octave scale
\transpose c c % \transpose c c IS DEFAULT: CHANGE TO c d TWICE Free singing lessons/Song list/Four octave scale

example
\transpose c d % \transpose c c IS DEFAULT: CHANGE TO c d TWICE