Cleaner music when laptop is on battery vs plugged in


Hi,
My setup is like this : Laptop -> DAC -> Amp -> Speakers.

Recently, I tried playing music on battery (of the laptop) and noticed that the sound is noticeably cleaner and more engaging than when the laptop is plugged in the power outlet.

I don't know if anybody has experienced the same or similar.

If I use the power filter, will I have the same result?
Thank you.
Ag insider logo xs@2xquanghuy147
I would hazard a guess that when you use it from battery you are not getting all the and RFI from the mains supply.
Laptops are notorious as the worst possible devices to use in Computer Audio, for the very reason cited. May I suggest, as a very inexpensive alternative, using a Raspberry Pi computer with a digi+ S/PDIF card, and eliminate the laptop.
Make sure your USB cable from the PC to the DAC has a ferrite core at the PC end, and even better, both ends.