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Logic Pro hangs for 10-15 seconds when recording or playing

1932 Views 29 Replies Latest reply: Feb 14, 2012 9:45 PM by Pancenter RSS
  • Pancenter Level 5 Level 5 (7,505 points)

    No problem..


    I know of someone who has the same PR4 TB array.. and has had some data corruption problems with the drives.


    I usually suspect new technolgy but it seems like your system is solid otherwise.


    It's very possible it's one of those combination problems that are hard to diagnose.. Like between a USB audio device and the R4 driver. (does the Pegusus use  drivers?)


    I'm curious about recording to the internal drive with the R4 disconnected from your system.

  • Pancenter Level 5 Level 5 (7,505 points)

    Ugh... sorry to hear that... hope you don't lose anything.

  • Pancenter Level 5 Level 5 (7,505 points)

    Interesting solution, glad to hear you have it working properly.


    The Rode mic you have has quite decent specs, it's not a bad unit. The problem with single input USB device is splitting the Input and Output over different audio devices, there's a few subtle problems with this regarding digital clock sync. An audio device works best when the digital clock is hardware synced to both input and output. (As in a self contained audio interface)


    With a USB mic and Logic's built-in-audio a type of software sync is used, usually the audio at the output has to be resampled in the background to match the sample clock rate of the input.


    Besides, the Mac's audio output is noisy and doesn't have an even frequncy response, nothing you would want to use for reference listening. However.. for what you're doing now that setup may be fine. If you wish to stick with what you have for now, create and Aggregate device for each of your setups. Usually you will set the audio input device as the clock master and the output to resample.




    The most resonably priced and technically solid (great drivers) for Mac are made my MOTU (Mark of the Unicorn).


    Mics... it depends on your price range.






  • CCTM Level 6 Level 6 (8,550 points)

    Cheesenightmare wrote:



    Now I am completely convinced that Logic has an issue with the home directory being on an external drive - or at least on my RAID - and I have perminently moved the home directly back to the local drive.




    So, with your 'Home' folder back on the boot disk, you are still storing and running your Logic Projects on the RAID, or are you saving to the Home folder?



  • Pancenter Level 5 Level 5 (7,505 points)

    Going back to one of my earlier posts.. you're 100% all the raid drives are formatted Mac OSX extended. (I'm sure they must be)


    Logic used to exhibit the exact same behavior when recording to an external drive that wasn't formatted Mac OS Extended.


    The problem probably lies in the firmware (and/or driver) communication between the Mac and the Pegasus, Logic is not recognizing the format and doesn't know how much space it needs to allocate for recording. (another weird Logic quirk).


    I'm still thinking a firmware update to the Pegasus controller might fix the problem, you might want to let them know what you're experiencing.


    p.s. That's the best Mic you can get anywhere close to the price range.

  • Pancenter Level 5 Level 5 (7,505 points)

    You can format drives used for large files (like audio/video) with Journaling Off, as a journaled drive will not protect large files from corruption.


    As a matter of fact... (shhh, don't tell Apple) I have all my drives, including my system drive formatted with journaling off, makes for a speedier, perky system.   I back up on a regular basis and I've never had a corrupt drive or partition where journaling would've helped. Journaling was originally designed for servers and mainly affects small files.. I did some research and talked with one of the guys I know at Apple.. it's virtually useless for large file storage and will slow things down.

  • Pancenter Level 5 Level 5 (7,505 points)
  • Pancenter Level 5 Level 5 (7,505 points)

    Thanks for the followup, hope it all works for you, looks like a great sounding setup you're putting together.

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