oboedoc

You might want to check out the Berio Sequenza for oboe and any of Silvestrini's works for oboe or EH to get ideas for notating timbral trills and other extended techniques. It's always useful to work with an oboist, because whatever fingerings you decide to use, they WON'T work on every oboe. A new player would have to try them out and probably modify them to find new fingerings that have the effect that you want. Good luck. We oboists always want more music written for us!