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5 - Effects
Core Effects Descriptions
E-MU Digital Audio System 69
Freq Shifter
This unusual effect is sometimes called “spectrum shifting” or “single sideband
modulation”. Frequency shifting shifts every frequency in the signal by a fixed number
of Hz which causes the harmonics to lose their normal relationship. The more common
pitch shifter, in contrast, preserves the harmonic relationships of the signal and so is
better suited to creating “musical” harmonies.
f You can also type in
exact frequencies to a
resolution of 1/10 Hz.
This isn’t to say that the frequency shifter can’t be used musically. Small intervals of
frequency shifting (1 Hz and below) can produce a wonderful, lush chorusing or
phasing effect. For bizarre frequency shifting effects, simply crank up the frequency
knob. Frequencies can be shifted up or down by any specified amount from .1 Hz to 24
kHz. You can also shift pitch up on one side and down on the other if you wish.
Comparison between Pitch and Frequency Shifting
Harmonic
Original
(Hz)
Pitch Shifted
(100 Hz)
Frequency Shifted
(100 Hz)
1 200 300 300
2 400 600 500
3 600 900 700
4 800 1200 900
5 1000 1500 1100
6 1200 1800 1300
7 1400 2100 1500
8 1600 2400 1700
Parameter Description
Frequency Sets the number of Hz that will be added or subtracted with every
harmonic in the signal. Range: .01Hz to 24kHz
Left Direction Sets pitch shift up or down for the left channel.
Right Direction Sets pitch shift up or down for the right channel.