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  1. #1
    Bluetooth headphones and Garageband
    Evening Macforumland,
    Currently I am running High Sierra 10.13.1 on a late 2009 iMac. 2.66 corei5 and 4Gb RAM.
    Garageband is at 10.2.0

    When using a new pair of bluetooth AKG's with Garageband I experience massive latency (well at least half a second) when using the app as a practice tool. Electric guitar plugged directly into the line input. The resulting output to the bluetooth headphones gives the effect of a slap-back delay rendering monitoring useless and impossible to use.
    Just occasionally I experience the same with wired headphones, but this is cured by quitting and relaunching Garageband.
    Apple support suggested resetting the NVRAM but this had no effect and I have tried a couple of the internet fixes without any success.

    What's the issue and how do I fix it?

    Thanks in advance.

  2. #2
    Bluetooth headphones and Garageband
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, Mojave
    Welcome to our forums.

    Your 2009 iMac may be limited in that it uses an older version of Bluetooth and you only have 4 GB of memory installed. More memory won't help with the latency problem but should speed things up somewhat. Other than that, I don't know what else you can do. Perhaps someone else will have some suggestions for you.

  3. #3
    Bluetooth headphones and Garageband
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Brentwood Bay, BC, Canada
    Maybe these oldie suggestions could help:
    How to Use GarageBand : How to Reduce Latency: GarageBand Tutorial

    And you may want to check out some other hits from these:

    PS: Personally I sure wouldn't have gone to High Sierra with that Mac, and especially when or if using an app like GarageBand but maybe they can get along OK together.

    And not forgetting comments such as this, especially with older BT versions and hardware:
    Audio over Bluetooth is slow, it needs to be compressed, encoded to be sent and then uuencoded all on the fly. Wired is the way to go when latency is a issue.

    And the Mac's Bluetooth Capabilities by model, if it makes any difference with speed etc.:

    - Patrick
    Last edited by pm-r; 11-23-2017 at 09:14 PM.

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