This README describes the audio assets, and how they relate to each other.
The product .mk references one of the AudioPackage*.mk,
which installs the appropriate assets into the destination directory.
For UI sound effects,
frameworks/base/media/java/android/media/AudioService.java array
SOUND_EFFECT_FILES contains a hard-coded list of asset filenames, stored
in directory SOUND_EFFECTS_PATH.
Touch sounds
------------
effects/Effect_Tick.ogg
old, referenced by AudioPackage[2345].mk OriginalAudio.mk
effects/ogg/Effect_Tick.ogg
new, referenced by AudioPackage[6789].mk AudioPackage7alt.mk AudioPackage10.mk
effects/ogg/Effect_Tick_48k.ogg
oggdec -o temp.wav ogg/Effect_Tick.ogg
sox temp.wav -r 48000 temp48k.wav
oggenc -b 80 -o ogg/Effect_Tick_48k.ogg temp48k.wav
effects/wav/Effect_Tick.wav
does not appear to be related to the other files in any obvious way
Video recording
---------------
./effects/ogg/VideoStop_48k.ogg
unused
cacfe69b68