Hello, recently I purchased a new RPI 2 (Model B), This pi was supposed to control my surrounding system but unfortunately it has major background noises from the 3.5mm jack. Before using this pi 2 I used the first RPI (Model B) to control the system, it also had some background noises but it was nothing compared to the new one.
As I understood, it was supposed to be the opposite - the newer pi (since model B+), have better audio circuit, but the results are proofing else.
Any ideas?