Hi,
I'm getting confused on make-polyshape and partials->polynomial.
re: sndclm manual
partials->polynomial takes a list or float-vector of partial numbers and
amplitudes and returns the Chebyshev polynomial coefficients that produce that
spectrum. These coefficients can be passed to polyshape (the coeffs argument),
or used directly by polynomial...
ex.
(partials->polynomial '(1 1 3 2 6 1))
;(-1.0 -5.0 18.0 8.0 -48.0 0.0 32.0)
I'm trying to figure out how to use the coefficients, but I get an "attempt
to apply a real -1.0, etc. error" when I plugin the float vector to the coeffs
parameter.
(with-sound ()
(let ((gen (make-polyshape 400.0 :coeffs (-1.0 -5.0 18.0 8.0 -48.0 0.0
32.0))))
(do ((i 0 (+ i 1)))
((= i 88200))
(outa i (* .5 (polyshape gen 0.25))))))
How do you go about applying the partials->polynomial output to
make-polyshape? I couldn't seem to grep an example of that in the code.
Thank you,
Jim
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