WE BUILD IN THE MP3 MODULE MUSES. CENTRE OF LG FFH 5600

Speculations concerning an ambient noise.
It is a problem of all modules as to them there is general minus, as on a supply
and on an audio output. In case of connection of the module if the earth is soldered to an input of AUX of muses by audio. center.
On a supply it is possible not to solder minus, the module all the same will turn on. It is checked personally.
This proof of the general GND of minus
To remove a background, there are several options. It in the theory as it will be in practice I don't know. I will try.
1) To remove a jumper (zero resistance) but probably there is a chance to burn a bluetooth the module.
2) To solder the condenser on a supply by a nominal 16v 1000 microfarad (probability that will filter about 50% of noise).
3) To make an independent supply of the module, that is not to take a supply from a board of muses. center.
As option to take telephone charging 5v and it will be connected to tension 220v ~ which goes on the transformer of muses. center.
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