<p>For producing printable lead sheets, VocalEasel relies on the
<ahref="http://www.lilypond.org">LilyPond</a> system written by
Han-Wen Nienhuys <<ahref="mailto:hanwen@xs4all.nl">hanwen@xs4all.nl</a>>, Jan Nieuwenhuizen <<ahref="mailto:janneke@gnu.org">janneke@gnu.org</a>>,
and others.</p>
<p>For producing MIDI accompaniments, VocalEasel relies on the
<ahref="http://www.mellowood.ca/mma">MMA</a> Musical Midi Accompaniment system
written by Robert van der Poel <<ahref="mailto:bob@mellowood.ca">bob@mellowood.ca</a>>.</p>
<p>The Band-in-a-Box import code is based on reverse engineering work by Alf Warnock <<ahref="http://www.alfwarnock.info/alfs">http://www.alfwarnock.info/alfs</a>> and Alain Brenzikofer <<ahref="mailto:biabconverter@brenzi.ch">biabconverter@brenzi.ch</a>></p>