Hello everyone,

I would very much appreciate anyones help!
I have the following problem:

When activating the recording in Logic, there slowly grows a noise that is not there in the beginning but get's worse and worse after approx. 20 sec. until finally everything that comes through the microphone is distorted.

I use a USB audiointerface and a little pre-amp. the microphone is a phantom powered one but the same happens with standard microphones.
It used to work fine with other microphones when I tried it a couple of months ago.

Plugging of the power cable from my macbook doesn't change anything.
I have to restart logic to get rid of the noise but of cours it starts again after 20 sec.

Any ideas anyone?

Thanks,
Tom