Hello, I don't know if someone might be able to help me, but here it goes... I have 4540s i3 running 10.8.5 that has been running very nicely with very little issues for almost a year now. I installed with this guide -> https://www.tonymacx86.com/threads/guide-to-installing-mountain-lion-on-hp-probook.77057/ and I haven't had any issues till now. I use the computer to make music using various different programs and hardware. I have always recorded with just the onboard line...
Hp Probook 4540s Audio Crackling/ Static/ Corrupted
Hp Probook 4540s Audio Crackling/ Static/ Corrupted