Engine buzzing sound

Sounds like a bearing gone bad in power steering pump. does noise change pitch with the turning of steering wheel?

I cant say that I have noticed that the sound changes when I turn.

From a forum post I made, some say it might be the auxiliary tensioner?

Yes that could be can you remove drive belt see if noise stops if so hand turn pullies see if any feel rough or loose

I took off the belt 2 days ago, and the Noise stopped.

The Tensioner I did not feel and grinding in the Tensioner, but when the Power steering pump did feel loose, as I could tilt it slightly, but not much.
when beeing turned by hand it did not make any sound.

The Alternator did not feel loose, but I did not manage to turn it, as it was too far down to reach.