I can't win this noise.

[jinkuchi]

LM 3886 typical circuit. plus optional components in datasheet.

some day the noise come from electric motors from AC line.
in 9.30 AM some day about 10 min and it gone.
There are many industries or wood crafting around here.

I try every thing.
not work.

Japanese AC line noise filter
small c input to ground
small c input+ , - of the ic.

event I turn volume to ground it still noise.
volume is ALPS made in Japan.

I attach the noise I record from speaker. up volume 300%.

[djoffe]

please post your schematic...everyone has a different idea of "typical".

[gmphadte]

Is your assy inside a metal chassis or open.

Gajanan Phadte

[madtecchy]

just start listening at 09:40. then no noise to filter.

Ian