Creative 1820M, 1212M owner manual Phase Shifter, Rotary

5 - Effects

Core Effects Descriptions

Phase Shifter

A phase shifter produces a fixed number of peaks and notches in the audio spectrum which can be swept up and down in frequency with a low frequency oscillator (LFO). This creates a swirly, ethereal sound with harmonically rich sound sources of a type of pitch shift with simpler sounds. The phase shifter was invented in the 1970’s and the characteristic sound of this device evokes emotions of that musical era.

By setting the LFO Depth to zero and tuning the LFO Center, a fixed multi-notch filter is created.

Feedback

In

Signal path = Stereo

Phase

Shifter

Out

LFO Center

LFO

	LFO Rate
Parameter	Description
LFO Center	Sets the initial offset of the LFO and changes the position of the
	peaks and notches. Range: 0% to 100%
Feedback	Increases the depth of the notches and height of the peaks.
	Range: 0% to 100%
LFO Rate	Controls the sweep rate of the Low Frequency Oscillator.
	Range: .01Hz to 10Hz
LFO Depth	Controls how much the Center Frequency is swept by the LFO.
	Range: 0% to 100%
Waveform	Selects a Sine or Triangle wave for the LFO
LFO L/R Phase	Controls the stereo width by adjusting the phase difference
	between the left and right sweeps. Range: -180° to +180°

Rotary

This is a simulation of a rotating speaker used on organs. The rotating speaker was invented to give static organ tones a pipe organ type of animation, but this distinctive sound became a legend in its own right. Spinning a sound around the room creates a doppler pitch shift along with many other complex and musically pleasing sonic effects.

The Rotary incorporates acceleration and deceleration as you switch between the two speeds.

Parameter	Description
Speed	Switches between slow or fast rotor speeds with
	acceleration and deceleration as the speed changes.

E-MU Digital Audio System 73