My ears are ringing from blast of white noise from Logic 9

I have found that one fix for this issue is simply to wipe the hard drive and start again from scratch, reinstalling OS X and then your DAWs and content plus drivers for your Audio Interface.

A pain I know but it seems, to me at least, that this issue arises from a bad or missing update to OS X, somewhere in the past as every time I have had a client with this issue, starting again from scratch and doing a clean install of everything.. has fixed the issue.

I have a mid-2012 13" macbook pro with 8GB RAM, 2.5 intel core i5... I'm recording vocals for a new project through the Apogee Duet (FireWire) into the new Logic X. The project uses a sample originally at 110.9 BPM and I have used Varispeed to slow the session down to the desired 88 BPM to begin recording vocals (22.9 BPM). As I begin to record the vocals (audio preferences at 256 buffer, 24-bit Recording, Software Monitoring), about 5 seconds in, I get the deafening blast everyone has been talking about). I can re-create this problem every single time with the same results and have only found 2 solutions:

1. Change buffer size to 512 (not desireable due to latency)

2. Raise the BPM from 88 to 90 (yes, a difference of 2 BPM allows me to record without hearing the noise blast)

This has only started happening since I purchased this macbook in April 2013 and upgraded to Mavericks.

I used to work in Logic 9 with Mavericks and experienced the same issue and unfortunately, the Logic X upgrade did not fix the issue. Nor do I think there is an issue with my Apogee Duet (FireWire) or MacBook...

I think that it could very well be the OS causing the problem as I never experienced this issue prior to updating the OS and have recorded plenty of session with varispeed over the years.

I think that it could very well be the OS causing the problem as I never experienced this issue prior to updating the OS and have recorded plenty of session with varispeed over the years.

Could very well be, recent OS upgrades use more CPU and are graphics intensive. There's a Mavericks update on the horizon, hopefully it will help your problem.

This VERY PAINFUL, VERY LOUD blast of white noise that comes out of nowwhere for no reason (I'm not recording or playing back) just happened to me yet again for the 4th or 5th time in 2 years. Have you any information of the cause? Has Apple addressed the issue for the safety and health of their customers and provided a fix? My ears are ringing and hurt. I'm afraid to use my system. That's not right! A single loud blast can permanently damage one's hearing. I've seen posts going back to 2007 on this subject. There must be a reason that can and should have been addressed by now. From reading this and other threads it's clearly not a Logic or other audio software issue or audio interface issue.

I am on Logic 8.0.2 OS 10.4.11...