Hello,

using pitch-transpose i sometimes get unexpected results with pitches as transpose value. the results are one octave lower than expected. Here are examples:

(pitch-transpose 'd3 '(c3 d3 e3 f3))

-> (d2 e2 fs2 g2)

(pitch-transpose 'd2 '(c3 d3 e3 f3))

-> (d1 e1 fs1 g1)

(pitch-transpose 'd4 '(c3 d3 e3 f3))

-> (d3 e3 fs3 g3)

interestingly, this one works as expected:

(pitch-transpose 'd5 '(c4 d4 e4 f4))

-> (d5 e5 fs5 g5)

What am i missing?

I think when using a pitch for the transpose argument, OM uses pitch-to-integer, so your first example

(pitch-transpose 'd3 '(c3 d3 e3 f3)) is actually (pitch-transpose (pitch-to-integer 'd3) '(c3 d3 e3 f3)) ) = (pitch-transpose -10 '(c3 d3 e3 f3))

You are better off writing (pitch-transpose 2 '(c3 d3 e3 f3)) if you want to transpose a second (two steps) up.

Jesper

You could also create a function that will give you the result you expected.

(defun pitch-transp (transpose pitches)

(pitch-transpose (first (pitch-to-interval (list (first pitches) transpose))) pitches)

)

(pitch-transp 'd3 '(c3 d3 e3 f3))

=>(d3 e3 fs3 g3)

(pitch-transp 'd5 '(c4 d4 e4 f4))

=>(d5 e5 fs5 g5)

hello jesper,

ah! thanks for pointing me to pitch-to-integer and for the function.

i will use this!

m.