Nonstationary amplitude-giving oscillations. In (A–D), we show the average comodulogram for 50 realizations of a signal with a nonstationary amplitude-giving oscillation having center frequency 65 Hz and bandwidth 65 Hz, obtained with: (A) BPAC1; (B) BPAC2; (C) DFPAC; and (D) IMPAC. In (E–H), we show histograms of the phase and amplitude frequency bins at which the maximum PAC is observed, for all bandwidths, and for all methods.