These flutes are called baroque flute or traverso. The baroque flute originals are from the time of composers such as J. S. Bach, Telemann and Vivaldi. Copies now are used again, after a long period of using modern instruments, for playing their music.
There is general information on the traverso on this website. You will find brief history of the flute between mid seventeenth and mid nineteenth century. There is a page on early flute tuning, that I believe, has some information not found elsewhere. A page on baroque flute pitch discusses the choices made in our time for standard pitches at 415 and 392 Hz. Making replicas is discussed in a page on my philosophy. Several opinions from the past and my own views can be found in the page on woods for baroque flutes . Then there are some practical pages for instance on care and playing in of the traverso and a page with a traverso fingering table giving the normal fingering used for the copy of the Beukers original. There are a number of pages on the makers of originals. Also a page on Dutch makers with a calculation showing an estimate of .5% left over traverso. A page on the Ehrenfeld collection discusses my start in making traverso and my relationship in the past to that collection. Then here are some pages with personal information, such as my family, where I live and my curriculum vitae. There are also pages on subjects as reboring, key pads, resistance, the difference between loud and carrying, and festivals I will visit and some links.
Kate Clark with Frederick the Great on Tassi 392
The cd with Blavet duets and a concert is out for some time. The duets are played by Jed Wentz and Marion Moonen on two of my Tassi copies at 400Hz (to avoid misunderstanding, Jed is recording other Blavet on other flutes as well but this is only the Tassi's). The concert is by Musica ad Rhenum.