The discrete kinetic model is used to study the propagation of
sound waves in system of hard-disk-like rotating gases. The
anomalous (negative) attenuation or amplification which is
possibly due to the binary collision of a dilute-enough rotating
disk system (each with opposite-sign rotating direction or angular
momenta but the total (net) angular momenta is zero) or
microreversibility might arise from the implicit balance of the
angular momentum during encounter. Our results might give useful
idea to the instrumentation set-up of possible acceleration of
cosmic rays passing through this kind of channel and direct or
inverse cascades in two-dimensional rotating gases of
astrophysical problems.