There are scanning programs but as with OCR of any kind they cause so many editing problems it seems easier to just put the notes in with a sequencer or notation program manually. Though maybe that has changed.
That is interesting to hear about how wide a spread of distance in the reverb was used in this.
Was that the 8-velocity tam-tam? That seems to respond best to muted choke effects by using CC11. I wish a few more tamtam articulations would be recorded for those particular gongs, similar to the suspended cymbal in rolls - short and long crescendos, and choked. There is a lot of short ff tam-tam strokes in that score, isn't there? Those are very hard to play live.
I wondered about the same sort of thing Guy mentioned - what would Stravinsky think? If he wasn't biased against modern elements such as the technological approach, he probably would like this as it is very faithful to the score. I have around 20 recordings on CD and LP, including two different ones conducted by Stravinsky, and this recording though digitally created is not a mere stunt, but quite musically valid right alongside those. It is interesting to hear how various elements of the score - which is blisteringly difficult for a live orchestra to play - are actually clearer in this MIDI performance. And of course, the famously difficult changing irregular meters, so easy to screw up sitting in an orchestra (or waving one's hands in front of an orchestra) are absolutely perfect in MIDI. That also makes me think Stravinsky would like it - the accuracy of rhythm possible this way.