Skip to main content
\(\require{cancel}\)
Physics LibreTexts

13.1: Introduction

  • Page ID
    27657
  • \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)

    Echo, reverb, flanging, and chorusing are all classified as time delay effects. Basically, the sound is delayed by a certain amount of time and then added back to the original sound. The precise details on how the process occurs; the delay times, possible feedback paths and so forth define these processes. Echoes are distinct repeats of the signal, usually a few hundred or more milliseconds in spacing. A single relatively short echo is referred to as a slap echo, and if a little shorter yet, as doubling. Reverb is a collection of complex echoes, each with some filtering, creating a smooth continuous wash of sound. Flanging and chorusing are similar and are based on relatively short time delays (about 1 to 10 milliseconds for flanging and in the vicinity of 20 to 30 milliseconds for chorusing). These delays are varied over time and give rise to comb filter effects that impart a unique character to the signal.


    13.1: Introduction is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by James M. Fiore via source content that was edited to conform to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.