Ive been experimenting using the Raspberry Pi 2 B as a player combined with different HAT-DACS.
As far as software goes, it works a charm thanks to piCorePlayer or Max2Play, and sound is on par or better than SBT.
Sadly I find that the RPi board itself generates audible noise.
Now Ive tried three different boards from two different manufactures and they all generate the same kind of noise.
To illustrate Ive made simple recordings. While they do not give an absolute indication on how loud the noise is, they simple confirm that the RPi makes noise and at what frequencies: The attached graphs show ambient noise in a purplish color and the noise added by the RPi in light blue color a peak at around 2427Hz and multiple smaller peaks at higher frequencies.
Am I the only one experiencing this?
And if this is inherent to the RPIs, how can the board noise be eliminated or suppressed effectively?
As far as software goes, it works a charm thanks to piCorePlayer or Max2Play, and sound is on par or better than SBT.
Sadly I find that the RPi board itself generates audible noise.
Now Ive tried three different boards from two different manufactures and they all generate the same kind of noise.
To illustrate Ive made simple recordings. While they do not give an absolute indication on how loud the noise is, they simple confirm that the RPi makes noise and at what frequencies: The attached graphs show ambient noise in a purplish color and the noise added by the RPi in light blue color a peak at around 2427Hz and multiple smaller peaks at higher frequencies.
Am I the only one experiencing this?
And if this is inherent to the RPIs, how can the board noise be eliminated or suppressed effectively?