foo dsp atsurround is a small Windows audio plugin designed specifically for foobar2000 users. It is capable of encoding multichannel sources into 2-channel stereo mode for decoding data with an external surround capable audio receiver.

foobar2000 is a well-known audio player that comprises several advanced features. It supports a wide range of file formats, including audio CD playback, CD ripping, playlists, cropping options, MP3 tagging mode, batch tasks (e.g. remove, rename, copy), conversion jobs, volume normalization, media library, as well as file type associations. Plugins can be employed to enhance the overall functionality of foobar2000.

foo dsp atsurround gives you the possibility to reproduce surround sound information present in many stereo audio materials and make full use of your 5.1 surround speaker. Plus, you can listen to your favorite songs in virtual 5-point surround using headphones. The plugin also gets rid of the ‘in-head’ effect, so it feels like you are not wearing headphones at all.

The tool is compatible with Dolby and similar processors. It features bass redirection for discrete 5.1 satellite systems, surround channel delay, channel amplitude trimming options, as well as conversion of multichannel audio into surround encoded stereo audio.