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Freq Shifter<br />
This unusual effect is sometimes called “spectrum shifting” or “single sideband<br />
modulation”. Frequency shifting shifts every frequency in the signal by a fixed number<br />
of Hz which causes the harmonics to lose their normal relationship. The more<br />
common pitch shifter, in contrast, preserves the harmonic relationships of the signal<br />
and so is better suited to creating “musical” harmonies.<br />
This isn’t to say that the frequency shifter can’t be used musically. Small intervals of<br />
frequency shifting (1 Hz and below) can produce a wonderful, lush chorusing or<br />
phasing effect. For bizarre frequency shifting effects, simply crank up the frequency<br />
knob. Frequencies can be shifted up or down by any specified amount from .1 Hz to 24<br />
kHz. You can also shift pitch up on one side and down on the other if you wish.<br />
Comparison between Pitch and Frequency Shifting<br />
Harmonic<br />
Original<br />
(Hz)<br />
Pitch Shifted<br />
(100 Hz)<br />
Frequency Shifted<br />
(100 Hz)<br />
1 200 300 300<br />
2 400 600 500<br />
3 600 900 700<br />
4 800 1200 900<br />
5 1000 1500 1100<br />
6 1200 1800 1300<br />
7 1400 2100 1500<br />
8 1600 2400 1700<br />
Parameter Description<br />
Frequency Sets the number of Hz that will be added or subtracted with every<br />
harmonic in the signal. Range: .01Hz to 24kHz<br />
Left Direction Sets pitch shift up or down for the left channel.<br />
Right Direction Sets pitch shift up or down for the right channel.<br />
5 - Effects<br />
Core Effects Descriptions<br />
You can also type in<br />
exact frequencies to a<br />
resolution of 1/10 Hz.<br />
E-MU PCI Digital Audio Systems 71
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