Whatever note the string is tuned to, the chien will tap at the equivalent frequency. So for the ~293 taps per second, the trompette was tuned to d' (293.66 Hz, i.e. 293 vibrations per second. close enough.) If it had been tuned to c', it taps at 261.6 taps per second.
Alden > A few years ago I came across an article in > French titled 'Functionnement du chevalet mobile > de la vielle à roue' by Pierre Rebaud, originally > published in 1984,which shows the various forces > on the chien which cause it to work. The article > says that the up and down movement of the chien > repeats 'approxiamately 293' times a second. I > can only find hard-copy at the moment, but will > scan it in and post the article on the UK hurdy-gurdy site. > > Dave > >
