Abstract: A large class of sounds can be described in terms of rapid pressure fluctuations known as the ‘‘fine structure’’ and relatively slower amplitude changes called the ‘‘envelope.’’ Signals having the same envelope and occupying the same range of frequencies, but differing in their fine structure, are important to the study of fine structure perception. Voelcker’s [Proc. IEEE 54, 340–353, 735–755 (1966)] complementary two-tone complex pair is one of the simplest signals in this class, and has been used in a number of pitch related experiments. As an extension of these ideas, a computational algorithm is described to generate a common-envelope pair occupying the same range of frequencies of any bandlimited signal. Several properties of common-envelope signals are presented and methods of combining these signals to create other common-envelope signals are given. A few examples of multicomponent common-envelope signals are spectrally reversed linear-spaced complexes, spectral ramps, and multiple Voelcker two-tone pairs. Applications of these signals to psychoacoustic experiments are discussed. [Work supported by AFOSR.]