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ABOUT is dedicated to providing a collection of resources for individuals upmixing older mono music recordings to stereo.  Various attempts have been made through the years to "simulate" stereo from mono sources.  This website will focus on audio spectral editing, sound source separation, and other related tools and processes used specifically for the purpose of upmixing mono source material to stereo, with the goal of creating stereo mixes that are virtually indistinguishable from stereo mixes created using multitrack session tapes, had they existed.


Christopher Kissel

Independent Audio Engineer,

Moderator of the “Unconventional Stereo & Pseudostereo”

Forum on the Both Sides Now Stereo Chat Board,

Owner & Webmaster of



A featured example of the many mono recordings that have been upmixed to stereo through the use of spectral editing and/or sound source separation which are linked to on the MEDIA pages of this website...

Yes... this is a mono recording that has been upmixed to stereo!...

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