The answer to 'recessed lighting making buzzing noise' is that a buzzing sound coming from recessed lighting is usually caused by a problem with the electrical components or transformer. This could be due to a loose connection, a malfunctioning transformer, or interference from another electrical device. The buzzing may also be caused by a problem with the light bulb itself.
If the buzzing is mild and the light is still functioning properly, you may be able to fix it yourself by tightening any loose connections or replacing the light bulb. However, if the buzzing is loud or the light is flickering or not working at all, it's best to call in a professional electrician to diagnose and repair the issue. Attempting to fix complex electrical problems on your own can be dangerous and may result in further damage to your lighting system.