Alesis MidiVerb4 User Manual - Page 38

Overview of Effects - Chapter 3 Flange This is a mono, less processor intensive version of the Stereo Flange, used in the Multi Chain Configurations Flange->Realroom, Realroom->Flange and Flange->Dly>Room; the Double Configuration Realroom+Flange; and the Dual Mono Configurations Flange:Flange and Flange:Delay. The effect of mono flanging is achieved by splitting and slightly delaying one part of the signal, then varying the time delay, with an LFO. The delayed signal is then mixed back with the original sound to produce the "swishing" or "tunneling" sound. Lezlie With the Lezlie effect (found in the Lezlie->Room Configuration), the pitch change block becomes a rotating speaker simulator. This effect was extremely popular during the 1960's and was achieved by mechanically rotating the speakers to produce complex timbral changes. The Lezlie speaker system is most often used with rock organs, but is occasionally used for guitar amplification as well. Parameters include: Motor on/off, Speed, which can be slow or fast; and High Rotor Level, which lets you attenuate the volume of the high frequencies. When switching the Lezlie effect on and off, or when changing the speed between fast and slow, the effect will ramp rather than change abruptly, just as a true Lezlie speaker system would do. By raising the High Rotor Level, you can really make this effect scream. Tip: Try modulating the Motor or Speed with aftertouch. Stereo Pitch Shifter The Pitch Shifter effect transposes the pitch of the incoming signal by a fixed amount. It is useful for creating parallel harmonies, detuning, chorusing, and special effects. The Semi parameter shifts the pitch in increments of one half step, with a range of up or down one octave. The Fine parameter detunes the signal in very fine increments, with a range of up or down one half step. Also available are Delay and Feedback parameters. The Delay parameter delays the shifted signal up to 250 ms, or can be used with the Feedback parameter to produce decaying arpeggio effects. There are also Low Cut and High Cut filters in the feedback loop which can be used to alter the timbre of the sound as it repeats. The Stereo Pitch Shift configuration provides two discrete pitch shifters, each with their own Pan and Level control. Pitch This is a less processor-intensive version of the Pitch Shifter effect, used in the Multi Chain Configuration Pitch:Delay, and the Dual Mono Configuration Pitch:Pitch. Auto Pan The Auto Pan effect alternates the loudness of the signal in opposite channels at a definable rate. Low and high frequency cutting is available, and (like the flange effects) can be triggered by the input signal (either the left or right input, or both). MidiVerb 4 Reference Manual 37