Re. Geigenwerk versus /viola organista/, I'll leave this here: http://www.artsjournal.com/slippeddisc/2013/11/leonardos-instrument-no-its-an-obscure-german-cont

Re. Geigenwerk versus /viola organista/, I'll leave this here: http://www.artsjournal.com/slippeddisc/2013/11/leonardos-instrument-no-its-an-obscure-german-contraption.html http://www.artsjournal.com/slippeddisc/2013/11/leonardos-ins...