Dear PD-Users,

                         I'm having a problem with a patch that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.