foobar2000:Components/FreeSurround Decoder (foo_dsp_fsurround)

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FreeSurround Decoder
foo_dsp_fsurround
Developer(s)	Case
Repository
Release information
Initial release	September 24, 2024; 2 years ago
Stable release	0.1.2 (September 26, 2025)
Preview release
foobar2000 compatibility
Architecture	Windows 32-bit, Windows 64-bit
Minimum version	1.5
Maximum version
UI module(s)	N/A
Additional information
Use	DSP
License	GNU General Public License
Discussion thread	{{{discussion_thread}}}
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Description

FreeSurround Decoder decodes surround information from stereo music, and produces multichannel output from it.

The decoder should be compatible with the following coding schemes:

• Dolby Surround
• Dolby ProLogic
• Dolby ProLogic II
• SRS CircleSurround
• SRS CircleSurround II
• DTS Neo:6
• Lexicon Logic7
• Stereo Quadrophonic (SQ)
• Quadrophonic Stereo (QS)

SQ is decoded with mono surrounds (i.e. like ProLogic I), due to a defective coding specification.

QS requires the front stereo separation to be set to 1.5, or else the sound field will be too narrow.

External links

• FreeSurround Decoder on foobar2000.org
• Discussion topic on hydrogenaudio
• Component Home Page