Thanks - just trying to get a better picture, since I have none of your setup in front of me.
I was asking about which synths because some (Kontakt, for example) have keys set up that vary from preset to preset, and from not being present to there being several present - 'trigger notes' that affect aspects of the sound the preset is playing. For example, one of the strings sounds from Kontakt has several low notes that change the sound - pressing the low E on my controller causes the sound to change to pizzicato - NOT what I had wanted. The same patch has several other trigger notes, each of which change something with the nature of the sound produced by that preset. There are several such presets in Kontakt that I have run across, thus far.
Another NI instrument, Reaktor 5, has one preset that for some reason sometimes gets jazzed up and ends up playing back 1 whole step lower than it is supposed to. That one still eludes me, as to the cause.
I am not aware of those issues with Dim Pro or Rapture, but that's why I was asking about what synths you are using.
Can you try swapping out Dim Pro for some other synth? This would be just for a test. It would seem to me that this would tell you if the problem is within the MIDI data itself or with Dim Pro, IF swapping to a different synth results in normal playback with no pitch dropping.
Bob Bone