The Frequency Shifter is a VST 2.4 software effect for Microsoft Windows
written in native C++ code.
The main features are:
Frequency shifting up to ±5000 Hz.
Optional LFO with five waveforms.
Four frequency ranges, three mix modes.
Linked or individual control for both stereo channels.
Plug-in comes in 32 bit and 64 bit versions.
Fully compatible with SM Pro Audio's V-Machine.
The Frequency Shifter shifts the spectrum of the input signal up or
down along the frequency axis. This effect is also know as "Bode Frequency
Shifting" or "Single Sideband Modulation"; IMHO one of the most underrated
and ignored effects ever.
Do not confuse the Frequency Shifter with a pitch shifter! A pitch shifter
multiplies all frequencies of the input signal by a constant factor while a
frequency shifter adds (or subtracts) a constant amount of Hertz to (or from)
those frequencies. Thus, the harmonic structure of the input signal will
not be preserved in the modulated signal, resulting in a raw, inharmonic,
metallic, you-name-it sound the more you apply the effect. Even more,
if you mix a slightly shifted signal with the original input signal you
will get some uncommon phasing sound.