These are connected alternately at the top and bottom, resulting in a long, cylindrical wind passage within a compact body so that one can carry in one's pocket an instrument that will descend as low in pitch as a modern bassoon.
Additional holes are covered by the thumbs and second joint of the index finger in order to extend the range a perfect fourth below the nominal scale, like the curtal.
Praetorius writes in Syntagma Musicum II: "if a rackett is well drilled and is played by a good musician, it then can be made to produce a few more tones."
Extant specimens of the baroque rackett can be found in the Musikinstrumenten-Museum Berlin, the Rijksmuseum in Amsterdam and the Bayerisches Nationalmuseum in Munich.
[3] Early paintings of the Munich Court band and a carved cabinet by Christof Angermair depict a single rackett being played in a mixed consort of other instruments.
For Cant and Baroque Rackett plans : Trevor Robinson : The Amateur Wind Instrument Maker :University of Massachusetts Press : ISBN 0-87023-312-2 : Library of Congress Catalog Card Number 80-5381 / ML930.R62 1980 788