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Crackling and Static using Logic Express on MacBook Pro
by dfkendrick on 2009-04-06 06:16:17

I plugged my UX1 into my MBP and hear very bad static and crackling coming from the UX1 headphone output.  I am using Logic Express 8.  I can choke the gate down and get rid of most of it but there goes my sustain.  Any thoughts?  Thanks,  Don



Re: Crackling and Static using Logic Express on MacBook Pro
by lspiegel on 2009-06-22 09:56:14

First make sure all your drivers are up to date. Keep running Line6 Monkey. You'll need to reboot then run the Monkey over and over until no more updates are shown. If that doesn't fix it read on.

I had the same problem on my MBP with my UX2. When I ran System Profiler (Finder->AppleMenu->AboutThisMac/->Click on "More Info") it showed the USB port as being USB 1.0 speed (12 mb/sec), not the high speed USB 2.0 speed (480 mb/sec) the UX2 needs.

Line 6 says not to use an external USB hub, but that is what fixed the horrible cracking and popping and other noises for me.  I put an external powered USB 2.0 hub between the UX2 and the Mac's USB USB's input. The sound immediately cleared up, I even have other stuff on the 2.0 hub (an iLok key, external keyboard and track ball, iPhone dock...). None of that seems to interfere at all. The sound is now excellent.

Maybe Line6's drivers and hardware are not kicking the MBP's USB ports into USB 2.0 high speed mode. The Mac seems to think these Line6 devices are USB 1.0 instead of the USB 2.0. So it reads and writes the USB port at too slow a speed and the signal breaks up.

I hope this works for you. Good luck Don!

- Laurie



Re: Crackling and Static using Logic Express on MacBook Pro
by dfkendrick on 2009-06-22 14:49:53

Laurie,

Thanks so much for the info.  I will try that ASAP.  Sounds logical to me.

Don



Re: Crackling and Static using Logic Express on MacBook Pro
by Blue_Rocco on 2009-08-09 22:23:50

I have a GuitarPort. Just bought a new computer andI have spent the last week trying everything to nail down this crackling problem. Sometimes it worked, sometimes it would crackle no matter what I did. I COULD NOT get any consistant reaction. Sometimes I could play all night and it would be fine, most times I couldn't hear over the crackling. Installed a powered USB buss port ....... instant fix!



Re: Crackling and Static using Logic Express on MacBook Pro
by stefromfortworth on 2009-11-07 06:42:10

i have exactly the same problem..... windows 7 was supposed to help/fix the problem

it worked really well with xp so i don't know why this doesn't work

anyone seen the new m-audio fast track usb interface??

a friend of mine has one and its awsome.....

he had a slight problem with it at first but guess what!!

m-audio replied to his email and it works!!!

is anyone at line6 paying attention here?



Re: Crackling and Static using Logic Express on MacBook Pro
by Kakashi-Hattake on 2010-03-08 10:24:26

Thanks Bud!! That totally worked 



Re: Crackling and Static using Logic Express on MacBook Pro
by buckymarino on 2010-05-29 15:07:15

i unplugged mine from a regular non-powered hub and plugged it right into the imac and it got rid of the problem (logic pro)



Re: Crackling and Static using Logic Express on MacBook Pro
by strangedogs on 2010-05-29 21:01:44

I've tried 2 different M-Audio FastTracks - both were flaky.  I returned the last one after 1 day (no more Pro Tools either) and got the Pod Studio GX1 - works flawlessly right off the bat - I wouldn't touch anything M-Audio had their hands on after all the hair pullin' I went through.  Really wanted it to work too as it came with Pro Tools 8 Essentials but I got terrible sound no matter what I did.  I have 2 other inerfaces so I do know how to set one up - one is my $500 Boss GS-10 and this little GX1 sounds every bit as nice and Pod Farm is a whole lotta great amp sim software considering I paid $99 for it.  I'm a Line 6 customer now for life.



Re: Crackling and Static using Logic Express on MacBook Pro
by dudemanalex on 2013-01-22 21:00:14

I had the same issue and I found that it went away by 1) plugging it into a 2.0 usb port then in podfarm I went preferences>hardware>tonedirect settings and changed the bit rate from 16 to 32bit and buffer size to extra large. Give it a shot!




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