Uncle Playing in German Orchestra 17th October 1945

Would any of you fine people know anything about my uncle (once again) F/O Arthur George Boud 172050,or the event, who wrote;
’17th October 1945 – Special Trip – Flew from base (625 Sqn Kelstern) to Berlin. Played violin in German orchestra!
Strange to think bombing city earlier.’
In anticipation – Steve Bell