The techniques of flanging (signal + delayed signal) and processing with a phaser (signal + all-pass filtered signal) are discussed. The considerable differences between the results of the two techniques are noted. It is shown that in the limit of an infinite number of one-pole all-pass stages processing with a phaser can become equivalent to flanging. It is shown that for a finite number of stages a phaser is optimized if all stages have the same time constant. In that case the peaks and zeros of the transfer function are most uniformly distributed in frequency.

Author: Hartmann, William M.
Affiliations: Department of Physics, Michigan State University, East Lansing, MI ; Laboratory of Psychophysics, Harvard University, Cambridge, MA(See document for exact affiliation information.)
JAES Volume 26 Issue 6 pp. 439-443; June 1978
Publication Date: June 1, 1978

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