Swawadee: Connecting the output of a MIDI keyboard to the WAV input means the Iynonix will sample the sound - it won't relay the MIDI signals to Sibelius. Unforunately I have now experience with Sibelius7, I've only used 2 and 3 on PCs. If they are as similar as I believe, then you will not be able to record in with FlexiTime on an Iyonix until some body implements true MIDI support (for Iyonix).