Playback, not an export
Slow down a recording
Listen more carefully to a lecture, interview, or music passage with VLC.
Start with VLCFreeExplore VLC 
Do this
- 1Import a local audio file into VLC, using its file-sharing or import options.
- 2Open the recording and locate the playback-speed control.
- 3Reduce the speed and replay the passage you want to hear.