Single partials are selected from a synthetic tone (f₀=261.6256 Hz, B=2.9936×10^-4) consisting of 58 sinusoids by using an FIR-based and an IIR-based inverse comb filter (ICF) in cascade with a resonator. In the first case, the original tone is played followed by the first and 25^th partials (partial #55 is excluded because of the very high frequency, f₅₅=19863 Hz). In the second case, the partials #1-#10 are played after the original tone. The signals are separated with a short pause, and the amplitudes of single partials are scaled. The signals are filtered once.

[ (1) original tone --- (2) partial #1 --- (3) partial #25 ]

[ (1) original tone --- (2) partial #1 --- (3) partial #2 --- ... --- (11) partial #10 ]

Residual signals are extracted from recorded piano tones C2, FIS#3, and D5 using an ICF where the delay line has been replaced with a large FIR filter or an IIR filter. In each sound sample, first the original tone is played, then the residual signal, which is obtained by filtering the original tone once, and finally the residual signal which is obtained when the original tone is filtered twice. The residual signals are scaled in order to better demonstrate the effect.

[ (1) original tone --- (2) original tone filtered once --- (3) original tone filtered twice ]

10 first partials are selected from a recorded piano tone A4 by using an FIR-based and an IIR-based ICF in cascade with a resonator. The signals are separated with a short pause, and the selected partials are scaled so that the amplitude of the N^th partial is 1/N. The signals are filtered once.

[ (1) original tone --- (2) partial #1 --- (3) partial #2 --- ... --- (11) partial #10 ]