Boss Audio Systems RT-20 Musical Instrument User Manual

Thank you, and congratulations on your choice of BOSS RT-20 Rotary Sound Processor.
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY”
and “IMPORTANT NOTES” (separate sheet).
These sections provide important information concerning the proper operation of the unit.
Additionally, in order to feel assured that you have gained a good grasp of every feature
provided by your new unit, this manual should be read in its entirety. The manual should
be saved and kept on hand as a convenient reference.
Main Features
COSM Modeling faithfully creates the speaker characteristics, internal cabinet resonance,
rotation speed adjustments, and other particular elements of the rotary speaker to provide
realistic reproduction of the rotary speaker sound.
Includes overdrive, a must for rock sounds.
Features four internal sounds, from the conventional rotary sound to rock sounds and UNI-
V, a sound known and loved by many guitarists.
Expression pedal can be used to freely control the rotation speed.
Permits adjustment of the balance for the horn speaker and bass speaker volume levels,
something difficult to accomplish with the original speakers. Use the knob to make changes
in the tone, from sharp to mild, in real time.
Features Virtual Rotor Display that displays the speaker rotation effectively as a visual
COSM (Composite Object Sound Modeling)
Composite Object Sound Modeling (COSM) is BOSS/Roland’s
innovative and powerful sound modeling technology.
COSM analyzes the many factors that make up the original sound,
such as the electrical and physical characteristics of the original, and
then produces a digital model that can reproduce the same sound.
Copyright © 2005 BOSS CORPORATION
All rights reserved. No part of this publication may be reproduced in
any form without the written permission of BOSS CORPORATION.