E-MU 1212M PCIe - Manual (Page 67)

5 - Effects
Core Effects Descriptions
E-MU PCIe Digital Audio Systems 67
Chorus
An audio delay in the range of 15-20 milliseconds is too short to be an echo, but is
perceived by the ear as a distinctly separate sound. If we now vary the delay time in this
range, an effect called chorus is created, which gives the illusion of multiple sound
sources. A slight amount of feedback serves to increase the effect. A very slow LFO rate
is usually best for a realistic effect, but a faster LFO rate can also be useful with minimal
LFO depth (.2). Since this is a stereo chorus, an LFO phase parameter is included which
can be used to widen the stereo image.
Parameter Description
Delay Sets the length of the delay. Range: 0ms to 20ms.
Feedback Sets the amount of delayed signal that will be recirculated through
the delay line. Range: 0% to 100%
LFO Rate Sets the frequency of the low frequency oscillator.
Range: .01Hz to 10Hz
LFO Depth Sets how much the LFO affects the delay time. Increases the
animation and amount of the chorus effect. Range: 0% to 100%
LFO Waveform Selectable between Sine or Triangle wave.
LFO L/R Phase Controls the stereo width by adjusting the phase difference of the LFO
waveform between left and right channels. Range: -180° to +180°