I have attached a sketch of how I connected the prototype audio amplifier with esp32 and vs1053. In general I wanted to make a separate power supply (5V) to the esp32, relay and vs1053 and (+-15V) to the amplifier.
Generally the connection works but there are problems, it happens that when I switch on another device next to it in the mains (230V) e.g. a
tube something gets a terrible "overdrive", probably the vs1053. And now I wonder if I can at all connect the GND of vs1053 ( and defacto the whole GND of the 5V circuit) in such a way with the GND of the amplifier ?
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Generally the connection works but there are problems, it happens that when I switch on another device next to it in the mains (230V) e.g. a

