An (optimized) implementation of the music DR measurement (compliant with http://dr.loudness-war.info/), it supports CUE sheets and is faster than all currently available alternatives (at the time of writing, not sure about now)

Flexible multi-user cue lists and stage instructions with Ableton Live, ClyphX Pro and TouchOSC Mk2. It provides and extended feature set compared to the original version, can be easily configured via JSON files and makes use of TouchOSC MK2's scripting capabilities on a variety of platforms.

Split flac files with embedded cue sheets and tags into multiple mp3 files