I believe I am experiencing this as well. Since upgrading to Maverick, I'm getting crackling on the speakers that seems to increase when CPU usage is occurring. It is extremely irritating!
Intel HDA. I can can provide output from any commands if you request to get hardware info. Relevant line from lspci: 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02) -- CPU usage dependent crackling on USB and internal sound card https://bugs.launchpad.net/bugs/597035 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
