Buzzing sound from speakers when lights are on

[Drumster]

This is happening on a 2009 CRV CDTi and has started happening in the last week or so.

Any ideas please?

[Haltamer]

Sounds like a grounding issue or interference - Have you plugged in anything new recently, 12v Chargers etc?

A quick general inspection of grounding points would be worthwhile.

[Drumster]

Ok, thanks for that . I’ve not changed anything on the electrics front, although it was in for a service last week, but can’t be sure it it started immediately afterwards.