Environment: Ableton 9.2b7 OSX 10.9.5 32-bit
The note numbers in Redux (e.g. C3) translate to note numbers in Ableton 2 8ves lower (e.g. C1).
Steps to Reproduce:
Place a sample or create a Phrase in Redux that maps to C5.
Play a C5 on Ableton's piano roll or with a controller.
The note or Phrase should play (since they were triggered by the host.
Nothing happens (or, something unexpected happens). However, if you play a note two octaves down (C3 in this case) the note or Phrase plays back. This is consistent behavior.