![]() When the knob is turned to the center, the amplitude is identical in both channels. When the pan pot is turned to the left, the amplitude of the signal in the left channel is increased while the amplitude in the right channel is decreased. ![]() The basic function of a pan pot is to change the amplitude of a signal in the left channel and also change the amplitude in the right channel. With a stereo pair of loudspeakers, the pan pot changes the signal from the left side over to the right side. The panning potentiometer (pan pot) is a variable control allowing an audio engineer to place a signal at different locations across the stereo field. Therefore, by having a gain of negative one on the delayed path, it flips which frequencies… High frequencies will pass through with constructive interference. This is the opposite result of the low-pass filter. When the two paths are combined at the output, low frequencies will be canceled out due to destructive interference. In other words, it flips the signal or reflects the waveform across the horizontal axis. This is equivalent to inverting the polarity of the signal. For the HPF, a gain of negative one is used on the delayed path. Parallel processing is used with one sample of delay. One implementation of a HPF is based on a modification to the low-pass filter. ![]() In other words, the high frequencies pass through the filter and the low frequencies are cut. The HPF can be used to reduce the amplitude of low frequencies without changing the amplitude of high frequencies. It is the complement of the low-pass filter. A high-pass filter (HPF) is a type of spectral effect.
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