OFFsurround

OFFsurround is a term used in audio engineering and music production to describe a specific method of creating a wider stereo image. It is a technique that manipulates the phase and amplitude of audio signals to enhance the perceived spaciousness and depth of a stereo recording. The core idea behind OFFsurround is to subtly alter the relationship between the left and right channels of a stereo signal in a way that trick the listener's brain into perceiving sound as coming from a wider area than the physical stereo speakers.

This effect is achieved through various processing techniques, often involving short delays, phase shifting, and subtle equalization applied differently to each channel. The goal is not to create a true surround sound experience with multiple discrete channels, but rather to create an illusion of width within the standard stereo field. This can make instruments or vocals sound more "outboard" of the speakers, contributing to a more immersive listening experience. OFFsurround is particularly useful for instruments like vocals, guitars, or synthesizers that might otherwise sound confined to the center of the stereo image.

While the precise implementation of OFFsurround can vary between different audio plugins and hardware processors, the underlying principle remains consistent: to expand the stereo field without introducing unwanted artifacts or compromising the mono compatibility of the audio. When used judiciously, it can add a professional polish and a sense of spaciousness to a mix. However, overuse can lead to a diffused or unnatural sound, so careful application is key to achieving the desired effect.