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Phasers vs. Flangers

Discussion in 'Mixing & Song Critique' started by Paladyne, Jan 5, 2004.

  1. Paladyne

    Paladyne Guest

    I am familar with both of these types of sounds, but I do not really understand what a Phazer is. I know a Flanger mimics tape flangeing. How can one explain what a Phazer is, and how it scientifically is different from a Flanger. Thanks in advance!

  2. Steve Halko

    Steve Halko Guest

    The Phase Shifter was the first attempt at using electronics to emulate tape flanging. Real flanging requires a time delay, which was very difficult (and expensive) to achieve back in the late 60s. Phase Shifters use a series of all-pass filters in order to shift the phase of the signal. This phase-shifted signal is then added to the original (unshifted) signal.

    In a flanger, the signal undegoes a time-delay, then is added to the original (un-delayed) signal.

    In both the phaser and the flanger, the resulting frequency response has a series of notches (which represent those frequencies where the original signal and the time-dealyed (or phase-shifted) signal cancel each other. If this frequency reposnse is plotted on graph paper, the series of notches look kind of like the teeth on a comb, so the circuits are also known as comb filters.

    The difference between a phaser and flanger is in the positions of these notches. In a flanger, the notches are equally spaced, because the time delay is the same for all frequencies. In a phaser, the phase shifting looks like a time delay, but can be different for different frequencies - so notches in the phaser are not necessarily equally spaced, and therefore sounds different than a flanger.
  3. Paladyne

    Paladyne Guest

    thanks, this helped to clear that up for me!

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