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AudioDSP (Audio Digital Signal Processing) add-ons allow for all sorts of audio processing in Kodi. Currently there are only a small number of add-ons included by default as of Kodi v16.
1 List of ADSP add-ons
adsp.basic - available on all platforms except Android.
It started as the first add-on for AudioDSP. It's usecase is to provide basic and usefull tasks for audio processing.
- Speaker Gain. Here you can set gain values for all speaker channels of your configured ActiveAE sink.
- Speaker Delay. Here you can set delay values for all speaker channels of your configured ActiveAE sink.
- Dolby Pro Logic II downmixes your audio stream to stereo if your sink is configured with 2.0.
asdp.freesurround - available on all platforms except Android.
Is based on foo_dsp_fsurround, which is a open source plugin for foobar, from pro_optimizer. Its purpose is to decode surround information from your stereo music to produce 5.1 output. It works with any stereo surround sound format like - Dolby Surround, Dolby ProLogic, Dolby ProLogic II... for the full list please read the forum thread from pro_optimizer. It will also faithfully play back your 'plain old' stereo music, with the exception that echoes are usually played over the surround speakers, and some sound sources, usually strongly distorted guitars, choirs etc., tend to surround the listener instead of being played over the front speakers alone.
- Freesurround upmix is available if you configure your ActiveAE sink through more than 2.0 (stereo).
adsp.biquad.filters - more info - only available on Windows and Linux
This add-on is based on adsp.template and asplib, which implements a biquad filter structure for signal filtering. The filter structure is very familiar in audio processing and allows the realisation of almost all filter types like low-, high-, band-pass ... Currently this add-on only has one design equation for an graphical equalizer with 10 frequency bands and a main gain value. It processes all audio channels with the same filter configuration except the LFE (Low Frequency Effects or sub woofer) channel. This channel should be created or processed by another pre-processing add-on when LFE is not available.
- Post processing mode for all available audio sink channels except LFE.
2 Installing ADSP add-ons on Ubuntu
|Audio DSP add-ons are not currently included in the Team Kodi PPA.|
ADSP add-ons are binary add-ons, but in Ubuntu they are not packaged with Kodi. All other official Kodi versions have these add-ons included with the default install. For Ubuntu, they must be installed through apt-get. In the future this will be something the user can manage from within the Kodi GUI, but for now they must be installed outside of Kodi.
- Quit Kodi if it is already running and open a terminal window
- Type in
sudo apt-get updateand enter your password when prompted
- Type in
sudo apt-get install PACKAGENAMEHEREbut replace PACKAGENAMEHERE with a package name from the table below.
sudo apt-get install kodi-pvr-argustv
The ADSP client add-on should now be installed. If Kodi was already running, restart it to load the add-on.