Obi
New release, Obi 4.6 comes with highly demanded audio processing features like noise reduction, audio mixing from external file, enhanced fade in & fade out. It also brings ability to import cue markers while importing wav files, ability to export To-do markers to CSV file, the reference implementation of W3C audio Books specs & other improvements.
4.6.0
https://daisy.org/activities/software/obi/latest-release-notes/