Generating Spatialized Auditory Icons Using MPlayer And Ladspa

The Emacspeak GitHub repository now includes a new auditory icon theme pan-chimes — these are the result of spatializing theme chimes.

Here is the result of some fun with MPlayer and Ladspa over the Thanksgiving weekend. Package tap-plugins provides a number of interesting Ladspa plugins; one of these, tap_reverb is used in module emacspeak-m-player to provide a variety of predefined effects.

Library tap-plugins also includes Ladspa filter tap_autopan that pans the input audio signal — see that plugin's documentation for details.

The Linux media player mplayer allows the injection of ladspa plugins in its processing chain. Combining these, I have created theme pan-chimes that provides a spatialized version of sound-theme chimes.

See script apply-pan.sh in the Github repository to see how this new theme was generated.