User manual KURZWEIL ALGORITHMS1

[. . . ] Algorithm Reference 1998 All rights reserved. Kurzweil is a product line of Young Chang Co. ; V. is a registered trademark, and Kurzweil, K2500, and KDFX are trademarks of Young Chang Co. Hammond and Leslie are trademarks of Hammond Suzuki USA. [. . . ] Negative values bring down the right channel, and positive values bring down the left channel. Algorithm Reference-48 FXAlgs #150153: Choruses FXAlgs #150153: Choruses FXAlg #150: Chorus 1 FXAlg #151: Chorus 2 FXAlg #152: Dual Chorus 1 FXAlg #153: Dual Chorus 2 One- and three-tap stereo and dual-mono choruses Allocation Units: 1 for Chorus 1 and Dual Chorus 1; 2 for Chorus 2 and Dual Chorus 2 Chorus is an effect which gives the illusion of multiple voices playing in unison. The effect is achieved by detuning copies of the original signal and summing the detuned copies back with the original. Low-frequency oscillators (LFOs) are used modulate the positions of output taps from a delay line. The delay line tap modulation causes the pitch of the signal to shift up and down, producing the required detuning. The choruses are available as stereo or dual mono. The stereo choruses have the parameters for the left and right channels ganged. Chorus 2 is a 2-PAU multi-tapped delay (3 taps) based chorus effect with cross-coupling and individual output tap panning. Figure 1 is a simplified block diagram of the left channel of Chorus 2. Dry Feedback L Input High Freq Damping Delay Tap Levels From Right Channel To Right Channel Wet L Output Block diagram of left channel of Chorus 2. Right channel is the same. Algorithm Reference-49 FXAlgs #150153: Choruses The dual mono choruses are like the stereo choruses but have separate left and right controls. Dual mono choruses also allow you to pan the delay taps between left or right outputs. Dry Feedback L Input High Freq Damping Delay Tap Levels Wet From Right Channel To Right Channel Pan L Output Pan From Right Pans Pan To Right Wet Output Sum Block diagram of left channel of Dual Chorus 2. Right channel is similar. Chorus 1 uses just 1 PAU and has a single delay tap. Dry Feedback L Input High Freq Damping Tap Level From Right Channel To Right Channel Delay Wet L Output Block diagram of left channel of Chorus 1. Right channel is the same. Algorithm Reference-50 FXAlgs #150153: Choruses Dry Feedback L Input High Freq Damping Tap Level From Right Channel To Right Channel Delay Wet Pan L Output From Right Pans To Right Wet Output Sum Block diagram of left channel of Dual Chorus 1. The left and right channels pass through their own chorus blocks. There may be cross-coupling between the channels. For Chorus 2 and Dual Chorus 2, each channel has three moving taps which are summed, while Chorus 1 and Dual Chorus 1 have one moving tap for both channels. In the dual mono choruses you can pan the taps to left or right. The summed taps (or the single tap of Chorus 1) is used for the wet output signal. The summed tap outputs, weighted by their level controls, are used for feedback to the delay line input. The input and feedback signals go through a one-pole lowpass filter (HF Damping) before going entering the delay line. The Wet/Dry control is an equal power cross-fade. The Output Gain parameters affect both wet and dry signals. For each of the LFO tapped delay lines, you may set the tap levels, the left/right pan position, delays of the modulating delay lines, the rates of the LFO cycles, and the maximum depths of the pitch detuning. [. . . ] The overall gain or amplitude at the output of the effect. The amount of the pitcher signal to be sent directly to the output as a percent. Any signal that this parameter sends to the output does not get sent to the chorus or anger. Mix Chorus, Mix Flange The amount of the anger or chorus signal to send to the output as a percent. Pt/Dry->Ch, Pt/Dry->Fl The relative amount of pitcher signal to dry signal to send to the chorus or anger. [. . . ]