The present invention relates to a system and method which serves as a refinement in the criteria used to improve the performance of audio signal processing systems. The system includes a base unit that is adapted to removably store, recharge and communicate with personal microphone modules, table-top microphones, and audio adapters. The rotary distribution apparatus includes a driving arrangement that comprises a stationary shaft to which the stationary core is secured and a rotatable sleeve rotatable about the stationary shaft, the rotatable sleeve driving the rotatable outer shell and the rotatable indexing disc. The polymers are each formed from one or more monomer types and at least one monomer type has an amine functional group.