I'm teaching myself some DSP stuff, using Miller's Techniques, a Digital Filters book, and some other references, and I'm loving it. I am wondering, though, how one comes up with a complex audio signal for use in Pd. I want to experiment with [czero~], and I've also wondered where complex signals come from for [fft~]. It doesn't seem like it would be possible to create a complex signal from a real one, but maybe there are ways to synthesize them?
Thanks. -Chuckk