Wavetable

A stored digital audio signal (e.g. sinusoid) is merely a sequence (or array) of numbers:

$\displaystyle x(n)$ for $\displaystyle n=0, ..., N-1,$

where

is the array index.

Since a sinusoid is periodic, anything more than one period is, by definition, redundant.

Store one period in a wavetable and read table at different rates.

$\scalebox{.6}{\includegraphics{eps/wtableOsc.eps}}$

How do we read from the table at different rates?

``Music 171: Wavetables and Samplers'' by Tamara Smyth, Department of Music, University of California, San Diego (UCSD).