Group level time-frequency plots. The data were averaged across all trials and pre-selected MEG channels separately for the Left (LH) and Right (RH) Hemispheres. (A) Part 1. Non-streaming vs. streaming conditions are presented independently for LH and RH. Upper plots represent the frequency range from 6 to 14 Hz; lower plots the range from 1 to 6 Hz. (B) Part 2. Small vs. intermediate ∆f conditions are presented in the same way as part 1. (C) Part 3 . The plots show simultaneous presentation of independent A- and B-sound streams and the relevant resting brain-state. The two frequency ranges; from 6 to 14 Hz (upper plots) and from 1 to 6 Hz (lower plots) are presented separately for the LH and RH. Color bars represent the relative change of the spectral power. The strength of the signal is color-coded: high strength is denoted with red and low strength with blue.