These recorders are based on the three instruments played by angel musicians in the painting of 1463, The Coronation of the Virgin of Cologne by the Master of the Lyversberg Passion.
Their cylindrical bore give them a clear tone, with a loud, well balanced low register. The fingerings are similar to those of renaissance instruments. Their range is at least one octave and a seventh. The larger sizes can go up two octaves or more.
They are made from pearwood, cherry, or other fruit woods.
Availagle sizes: Alto in g, Alto in f , Soprano in c, Tenor in d, Tenor in c, Sopranino in f
Tailles disponibles : Alto en sol, Alto en fa, Soprano en ut, Ténor en ré , Ténor en ut, Sopranino en fa
440 Hz for all sizes, 466 Hz, 460 Hz, & 525 Hz for the soprano, alto, tenor in d and tenor in c.
Pythagorean, mean tone or equal temperaments on request
Some of the holes of the sopranino recorder are offset, like those of a Garkleinflöte, to avoid overlapping fingers.
You can listen to these recorders here
photo Charles Fischer
A set of medieval recorders: soprano, alto in g, alto in f & tenor in c