The following song file types can be opened in Reason 12:
- Reason song files (.reason, .rsndemo, .rns, .rps)
- Reason Intro song files: (.rei, .reidemo)
- Reason Lite song files: (.relt, .reltdemo)
- Reason Essentials song files (.ree, .reedemo)
- Reason Limited song files (.rltd)
- Reason Adapted song files (.rsb)
- Record song files (.record, .recdemo)
Note that song files created in Reason 12 cannot be opened in earlier Reason versions!
Also note that songs created in a DAW using Reason 12 Rack Plugin cannot be opened in the same DAW using Reason 11 Rack Plugin!