Maksy wrote:
I have an ION USB turntable for converting vinyl records to digital format. i.e. into iTunes. After 20 to 30 minutes of converting, a static sound develops. The ION solution is to "downgrade" the Mac USB driver to v2.5.0b8. My opinion is that it is a turntable problem (static buildup} but I am willing to try the "downgrade" but am concerned about restoring to the origonal driver. Has anyone had this problem or have any comments on downgrade and restore?
I did downgrade - ION emailed me a zip file to do so and I believe also one to undo the change.
The attachment is named:
OSX
USB_AudioDowngrade.zip (386KB) It might be downloadable somewhere, if not, get it from ION tech support.
I am enclosing a cut and paste of their email:
*+Thank you for contacting us, I am going to enclose a guide that will help to make sure your turntable is properly setup with your Mac. If you still experience issues after checking these settings, You may need to downgrade your USB audio codec. There is a problem with the USB Audio codec in MAC os versions 10.4.11 to the current, the problem is users will experience static, anywhere from 45seconds to 5 minutes during the playback / recording of there songs. I will attach the file and guide on how to do this. If you decide to do this, please make sure that you close all applications before performing the downgrade, make sure that the USB turntable is not hooked up to the computer during the process. Please know that you never improperly shut down your computer. If you still experience issues after this, please give us a call at the number below, and any of our agents will be more than happy to further assist you.+*
I made the change and no more problems. On another forum however had a negative comment on the solution; here's an excerpt:
+However I don't think "downgrading" the Mac USB services is a particularly good way to go. It smacks of somebody who designed a product around a software error. Then, when the error was corrected (newer Macs) the older products dropped dead. So rather than fix the product, already a thin profit margin item, and too late in many cases anyway, they tell you to break your Mac.
+
+ Are you serving **** on the internet yet? Are you sure? This would be a perfect way to plant bogus and dangerous software code on your machine, and yes, if you do it right, Macs can get sick like this. They made you change system software, right, and you had to put your password in?
+
I certainly hope this person is wrong.