Owner's Manual: The Arp Synthesizer Series 2500. Approx. 200 pages, xerox quality, illustrated. Cover Design (intertwined and locked spirals) generated on oscilloscopes by Arp Synthesizer. Chapters include: Unpacking and Installation, Theory of Operation, Matrix Switching Patching, Arp Function Modules: Oscillators, Filter/Amplifier, Envelope Generators, Noise Generator, Multimode Filter/Resonator, Balanced Modulator, Sequencer, Mixsequencer, Sample and Hold, Arp Data Sheets.