Hi @drfritzon
I didn't fix it myself. I didn't have the courage to open the anima phi.
I sent it to the guys at Adiyo who sent it back to me fixed. Unfortunately, they didn't describe exactly what the problem was.
I haven't had this problem since. I just got a whistling sound that disappeared again. Otherwise I am satisfied.
Anyma Phi SE from kickstarter campaign should come to me, so I'm looking forward to it.