This version (18 May 2021 09:02) was approved by John Joseph.The Previously approved version (19 Mar 2021 15:42) is available.Diff

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ADI Surround


ADI Surround uses matrix-surround decoding techniques: deriving five channels of output from a two-channel input. This process entails using a sum channel (the combination of the left and right channels, L+R), which contains frontal information, and a difference channel (the difference between the left and right channels, L-R / R-L), which contains ambiance information. Depending on the blending and distribution of the difference channel with the sum channel, we can derive the left, right, center, and side or rear surround channels. The L and R front speakers carry music, frontal sound effects, and directional dialog; the center speaker carries the rest (meaning most) of the dialog, and the surround speakers (ideally placed to the side of and slightly above the listeners) provide ambiance and surround effects


ADI Surround has presets for the following modes:

  • Club
  • Music
  • Stadium
  • Cinema
  • Hall
  • Rock
  • Jazz
  • User1
  • User2
  • User3

It also features two room sizes:

  • Small
  • Large

These Large and Small settings are to make it sound like a small or large room. This is a setting that can be experimented with to adjust for the room the system is in and personal preference. So there is no “correct” setting for this

Targets Supported

Name ADSP-214xx ADSP-215xx/SC5xx ADAU145x/146x
———————————————————— ——————-- ——————————-- —————————-
ADI Surround Sound NA NA S



Input 0AudioInput channel 0
Input 1AudioInput channel 1


Output0AudioOutput channel for left side
Output1AudioOutput channel for Center
Output2AudioOutput channel for Right side
Output3AudioOutput channel for Left surround
Output4AudioOutput channel for Right surround

Configurable Parameters

GUI Parameter NameDefault ValueRangeFunction Description
Mode Club NA 10 modes as mentioned in usage
RoomSize Small Small / Large Depends on the size of the rooms

DSP Parameters

Parameter Name Description ADSP-214xx/SC5xx/215xx ADAU145x/146x
—————————————- ——————————————————————————-- —————————————- —————————-
dil Scales the Surround sound parameters NA Integer32
gain1 Scales the Surround sound gain parameters NA FixPoint8d24
gain2 Scales the Surround sound gain parameters NA FixPoint8d24
gain3 Scales the Surround sound gain parameters NA FixPoint8d24
gain4 Scales the Surround sound gain parameters NA FixPoint8d24
resources/tools-software/sigmastudiov2/modules/gain/adisurround.txt · Last modified: 13 May 2021 06:04 by Nikhin Shetty