I have noticed that the Up2Stream Mini seems to pick up noise and hum. When I stream music that is not too loud (like acapella, or just a piano), I can clearly hear noise and hum. It is permanently there, but sometimes the noise gets stronger like a sharp hiss.
My configuration is an active speaker of Bang & Olufsen, and a Up2Stream Mini v3 built inside the speaker casing. To power the Up2Stream Mini, I use a 230 to 5 volt AC/DC converter. The Up2Stream Mini’s WiFi-antenna is on the outside of the speaker casing. The antenna wire goes in through a small hole.
I have tested with an external power supply to the Up2Stream Mini, but this does not solve the noise & hum.
I did find out that when I touch the WiFi antenna with my finger tip (where the wire connects to the antenna strip), the noise and hum almost disappear.
Does anyone have suggestions to eliminate the noise & hum?