There is only one file type that uses the .OMX extension:
OtsAV Media Library Information File
Media information file used by Ots audio software; contains audio analysis data for a corresponding .WAV or .MP3 file; typically created when an audio file is imported into an OtsAV media library.
Each OMX file is saved in the same folder as the associated audio file. The OMX file contains information about the audio file, but does not contain actual audio data.
Updated: December 25, 2007