User manual ALESIS QUADRAVERBGT

[. . . ] It combines analog and digital electronics to provide the best of both worlds. Analog effects include: Compression Distortion Flat/Presence/Brightness Control Bass Boost Speaker Cabinet Simulator (ideal for use with headphones or recording direct; can be bypassed when feeding a guitar amp) Noise Gate Programmable Effects Loop for inserting other effects (can also provide a signal send from the analog outputs, and receive a return signal into the digital processor) The digital effects are the same ones that have made the QuadraVerb Plus a favorite in studios and live equipment racks world-wide: Reverb Delay (stereo or mono) Pitch Change (chorus, flange, detune, phaser, etc. ) Equalization (graphic or parametric) Panning and Tremolo Ring Modulation Tunable Resonators (a very resonant filtering effect) Sampling (up to 1. 5 seconds of sound can be captured and replayed) The order of the analog effects are preset in their optimum positions; the routing of the digital effects is flexible and programmable. 100 edited programs can be saved in memory, and called up by front panel switches or MIDI program change commands. The QuadraVerb GT is also MIDI controllable. [. . . ] Center is 00. Multi Tap Feedback (config 4 only) The display says: TAP X FEEDBACK: 00% X is the number of the tap selected for editing. Increasing the feedback increases the number of successive echoes this tap will produce; each echo will be softer than its predecessor. Multi Tap Master Feedback (config 4 only) The display says: MASTER FEEDBACK: 00% This scales all feedback parameters simultaneously if you want to increase or decrease feedback without having to readjust each taps feedback parameter. 48 4. 6 EDITING PITCH PARAMETERS Configurations 1, 2, 4, 5, and 6 can access the pitch parameters. However, the pitch parameters are quite different for these configurations. Parameters are covered in the following order: Configurations 1 and 4 use pitch parameters in a relatively traditional manner (chorus, flange, pitch detune, and phase shifter). Configuration 2 uses the pitch module to access Lezlie effects. Configuration 5 uses the pitch module to access Reverb Chorus effects. Configuration 6 uses the pitch module to access Ring Modulator effects. Pitch Mode (configs 1, 4) Mono Chorus Splits the signal into two lines: one is unprocessed, while the other has its pitch changed in a cyclical manner. Mixing these two together produces frequency response and amplitude variations that create the sound of multiple instruments playing en ensemble. Stereo Chorus This is similar to mono chorus, but splits the signal into two pairs of two lines (one pair per channel). As the delay time in one channel is increasing, the other channels delay is decreasing and vice-versa. Mono Flange Similar to mono chorus, but with parameters optimized for flanging. This effect imparts a whooshing, jet airplane sound to the signal being processed. Stereo Flange Similar to stereo chorus, but with parameters optimized for flanging. Pitch Detune Detunes a signal slightly sharp or slightly flat. This is often used to obtain 12-string effects from a six-string guitar. Phase Shifter The Phase Shifter shifts the phase of certain frequencies to produce a comb filter effect. This produces a sound that is similar to flanging, but more subtle. For the deepest pitch effects, the dry and processed signal levels (found in the Mix section) should be equal (50% dry and 50% effect). 49 Pitch Input (configs 1, 4) Preamp Output The pitch module input signal comes from the preamp output. EQ Output The pitch module input signal comes after the EQ module. LFO Waveshape (Chorus only) As mentioned earlier, in chorusing the pitch change is cyclical. There are two ways to modulate the pitch: Triangle This produces a smooth, regular chorusing sound. Square The time delay jumps between two values, producing a more radical modulation effect. LFO Speed (Chorus and Flange only) The display says: LFO SPEED: 04 This parameter alters the rate of pitch modulation, from 01 (slow) to (fast) 99. LFO Depth (Chorus and Flange only) The display says: LFO DEPTH: 61 This parameter determines how much the modulation affects pitch. The higher the number, the greater the degree of pitch modulation. [. . . ] The QuadraVerb GT implements two different MIDI modes. Omni On/Poly (Mode 1) The QuadraVerb GT responds to MIDI data occurring on any channel. Omni Off/Poly (Mode 3) The QuadraVerb GT is tuned to a single MIDI channel, from 1 to 16. 8. 5 SYSTEM COMMON MESSAGES Intended for all units in a system, some of these messages are: Song Position Pointer This indicates how many "MIDI beats" (normally a 16th note) have elapsed since a piece started (up to 16, 384 total beats). It is primarily used to allow different sequencers and drum machines to auto-locate to each other so that if you start one sequencer, the other device will automatically jump to the same place in the song, whereupon both continue on together. [. . . ]