This is not so much an IMSLP related question, although it could be.
Assuming I take a piece by a contemporary composer such as Boulez or Ferneyhough, and I select 2 bars from an orchestral score, and I take those 2 bars and stretch them and re-orchestrate them to last 20 minutes. I then go on to compose some music on top of that (leaving the expanded part intact, and composing some other music for some other instrumentation).
Would that be a violation of copyright? Would I need to ask for permission before I did something like this? It would be impossible to perceive those two bars as what they really are, and very difficult to find on analysis of the score too, as it would be re-orchestrated to last 20 minutes (with dove-tailing, changes of instruments/timbres etc etc).
And, to relate this to ISLP - would I be allowed to upload such a piece on imslp?
