When troubleshooting a buzzing noise from my Windows laptop while listening on Bluetooth headphones, it made me curious why there was even an analog signal being produced. I only get this high-pitched noise when connected to my laptop, the headphones sound great when connected to other sources.
I am looking for some insight into when a possible analog signal is being created, and why. Is it possible that the audio drivers are accommodating a process which creates an analog signal that it must mix in with the other audio sources? That doesn't make much sense to me though. I've disabled all the mics, all other sound outputs except my headphones. Is it possible that my audio driver will always produce an analog signal to accommodate my laptop's headphone jack?