Here's a decent example of the quart bassoon or fagottino, pitched in F a fourth above the bassoon:
http://www.youtube.com/watch?v=AvHfghF3JUc
This instrument is made by Guntram Wolf
Enjoy,
Grant
http://www.youtube.com/watch?v=AvHfghF3JUc
This instrument is made by Guntram Wolf
Enjoy,
Grant