AFC helps dry or dead rooms provide a more pleasing listening experience for acoustical programs such as baroque or symphonic orchestras or choral ensembles or even pipe organs. AFC optimizes reverberation times for various types of programs presented in dry or dead multi-purpose rooms such as civic auditoria, gymnasia, or university theaters. AFC helps musicians play better in ensemble and with improved technique when the room absorbs all sound energy reflected back to the stage that the musicians need. Under balcony acoustical environments can be dry or sound very different from rest of the room, and AFC helps to correct these problems. In real symphony halls, short and late arriving early reflections determine spaciousness, add warmth, and insure instrument clarity. AFC can help with these important issues. Low ceiling rooms sound dry for acoustical music performance such as piano, woodwind or violin recitals or ensembles, and AFC can, figuratively, raise the roof to create a more pleasing listening environment. Dead rooms benefit from AFC when talkers want to speak and be heard without benefit of a worn microphone. The acoustical gain varies somewhat but usually falls somewhere in the range of 1 – 2 dB for an application such as a corporate boardroom or a training room. Very large spaces such as a large HOW or university theater frequently have several different acoustical environments that AFC can merge into a homogenous environment. Some spaces suffer from irregular absorption at certain frequencies which creates a cold or boomy or thin or tinny sounding room that AFC can help depending on the severity of the problem. Auditoria or rooms with large parallel planes have flutter echo issues that AFC can effectively mask but not actually correct. Certain other room geometry issues such as low ceiling side isles can be optimized with AFC. AFC can help a dry rehearsal space to mimic the reverberation qualities of a performance space such that the performance is then more acoustically comfortable for the musicians performing. Copyright (C)2009 Yamaha Corporation. All rights reserved.