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. [. . . ] Setting the Spacing control to +1 in Dual Lowpass mode means that the left filter has a cutoff frequency equal to where the Cutoff knob is set, and the right frequency has a cutoff frequency that is one octave higher than the left filter. This means when the Cutoff control is swept, two resonant peaks are heard, giving the filter a unique quality. In Highpass/Lowpass mode, the Spacing control sets the difference between the cutoff frequencies by shifting the highpass filter's cutoff frequency up or down. When the Spacing control is fully clockwise, the cutoff frequencies of the two filters are the same, making for a very narrow frequency band. 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. 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. 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. [. . . ] When PARAMETER DISPLAY is active, a change in the position of a knob or switch on the front panel causes the display to show the preset's stored value and the new value simultaneously. HEADPHONE VOLUME HEADPHONE VOLUME is used to determine whether the stored Headphone Volume value is loaded when a new preset becomes active. This is useful in case your presets have stored a high Headphone Volume value, or if you've changed to a different set of headphones and the volume is drastically louder than normal. MASTER VOLUME MASTER VOLUME is used to determine whether the stored Master Volume value is loaded when a new preset becomes active. [. . . ]