Guntram Wolf also developed a redesign of the
contrabassoon after an acoustical concept by
Benedikt Eppelsheim, called the "
Contraforte". The Contraforte was received well in many countries but has a very small following in the United States, with less than a half dozen players of the instrument. More recently, he and Eppelsheim developed a redesigned
bass oboe, called the "
Lupophone". ==References==