I am experiencing a crackle or rattle from the left speaker on my MacBook Pro. It occurrs with any sound or music being played. Started out of nowhere a couple of days ago. I do not listen to loud music on the computer that could 'blow' the speaker. I rebooted and cleared the NVRAM and well as the SMC with no effect. Any ideas?
I uploaded a video containing a sample here:
(the music is from an audio test video on Youtube)
I uploaded a video containing a sample here: