User manual MOOG VOYAGER

[. . . ] IMPORTANT SAFETY INSTRUCTIONS WARNING ­ When using electric products, basic precautions should always be followed, including the following: 1) Read all the instructions before using the product. 2) Do not use this product near water ­ for example, near a bathtub, washbowl, kitchen sink, in a wet basement, or near a swimming pool or the like. 3) This product should be used only with a cart or stand that is recommended by the manufacturer. 4) This product, in combination with an amplifier and headphones or speakers, may be capable of producing sound levels that could cause permanent hearing loss. [. . . ] RESONANCE: The Resonance control causes feedback in the filter circuit that adds harmonic emphasis at the cutoff frequency. This control affects the lowpass filters, but not the highpass filter. When the Resonance control is all the way down, the lowpass filters act as a tone control, rolling off high end as the Cutoff control is turned down. As the resonance increases, the filter begins to form a peak at the cutoff frequency. As the Cutoff control is swept the peaks reinforce the harmonics of the signal being filtered are reinforced ­ creating an effect that is vocal or zappy. As the Resonance is turned up the peak increases in strength until the control is set to 8 or higher, when it begins to self-oscillate ­ creating sine waves with the same frequency as the cutoff frequency. KEYBOARD CONTROL AMOUNT: The Keyboard Control Amount knob allows the Filter Cutoff to follow the key played on the keyboard. A higher key will cause a higher cutoff frequency. This allows a sound to retain its brightness as it is played higher on the keyboard. FILTER CONTROL INPUT: The Control Input on the back labeled FILTER is a CV input for external control of the Voyager's filter cutoff control. The Input accepts -5 to +5 volts, or an expression pedal like the EP-1. The voltage applied here is added to where the front panel Cutoff control is set. A one-volt change in this control voltage will change the cutoff frequencies of both filters by about one octave. 25 D. ENVELOPES When we think of a musical sound, say a plucked string, we think of it as having a start and an end. In the case of a plucked string, it begins with a burst of energy and then slowly fades out until it is silent. In synthesis terms, this is called an envelope ­ a shape that defines the changes that occur in a sound over time. An envelope can define any aspect of a change in sound ­ volume, timbre, or pitch for example. The Voyager has two envelope generators. When triggered, these circuits produce control voltages that vary as determined by the attack, decay, sustain and release controls. The Attack control determines the character of the onset of the sound. A short attack time corresponds to a sudden sound like a percussion instrument or a plucked string. A long attack time corresponds to a gradual onset of sound like a plane flying overhead, or the slow crescendo of a bowed string instrument. [. . . ] MIDI The current (as of 01/20/03) MIDI implementation of Version 1. 0 of the software allows for the transmission of Note On messages with Velocity, Program Change messages, and System Exclusive Data (software and preset banks). The Voyager will transmit MIDI Note On messages polyphonically. The Voyager responds to Note On messages, Program Change messages, All Notes Off, Pitch Bend, Mod Wheel (CC1), and Volume Controller (CC7) messages. The Voyager is a monophonic synthesizer, and responds to Note On messages based on the Note Priority and Trigger Mode selected. 46 Appendix A: Caring for your Voyager Clean the Voyager with a soft, moist cloth only ­ do not use solvents or abrasive detergents. [. . . ]