USB Recording in Logic Pro

1st Official Post
    The Profiler Model referred to in this thread is ...
    ☑️ Profiler Head/Rack

    Hi everyone

    My first time posting, and apologies if this has been asked and answered before; I couldn't find anything on here.

    I am using Logic Pro on an iMac and use a UAD Apollo Twin as my normal interface.

    When I attach the Kemper via USB direct to the Mac, and select 'Profiler' for the Input and Output in the Logic Pro Audio Settings; I can successfully record and playback in Logic whilst monitoring through headphones on the Kemper.

    Logic Pro does allow me to set the Input to 'Profiler' and the Output to the 'UAD Apollo' however, when I do this, whilst the signal from the Kemper is successfully recorded, I cannot hear it on my studio monitors (which are direct out of the UAD) whilst it's being recorded.

    Just to clarify what I mean, if I have a drum track (e.g. Superior Drummer 3) in the session; I can hear the drums through the studio monitors but cannot hear the guitar track until after it's been recorded. Obviously, it would be ideal to hear the guitar through the monitors as it's being recorded; but I cannot find a setting that allows this.

    Any help gratefully received.

    Kind regards.

    Terry

    Don't use the UAD as the output device. Send the audio from the Kemper audio outs to the UAD instead.

    Quote from Wheresthedug

    Do you have software monitoring enabled in Logic. It is likely that when using the UAD you were monithe direct signal to minimise latency but in the new setup the UAD isn’t seeing the direct signal so you need to use software monitoring in Logic. It will increathe latency a little though.

    Thanks Alan...I have tried the software monitoring set to both: enabled and disabled, but I'm still hearing nothing via the Apollo even though the Kemper output is being recorded; doubtless it's something I am not doing that I should lol! Thanks for your help.

    Terry

    Quote from Edward Dixon

    Don't use the UAD as the output device. Send the audio from the Kemper audio outs to the UAD instead.

    Thanks Edward...I previously recorded the way you suggest but the signal direct via USB sounds so much clearer (to my ears) than going into the UAD direct. Perhaps using an SPDIFconnection will help (have not tried that). Appreciate the reply.

    Terry

    Then the UAD is coloring the sound or you need to tweak the output settings in the Kemper. I use Reaper on a Windows 10 computer and a Behringer X32 digital mixer, the sound is the same at all points including headphones connected to the Kemper or the PM16 personal headphone monitors.

    Quote from Edward Dixon

    Then the UAD is coloring the sound or you need to tweak the output settings in the Kemper. I use Reaper on a Windows 10 computer and a Behringer X32 digital mixer, the sound is the same at all points including headphones connected to the Kemper or the PM16 personal headphone monitors.

    Thanks Edward...hearing that someone is getting the same sound using this method is really helpful.

    I think it's probably the Kemper I need to tweak so will play around with that.

    Thank you for putting my mind at rest with the old method which actually works easier in my workflow.

    Kindest regards.

    Terry

    Quote from Terry Barnett

    Thanks Alan...I have tried the software monitoring set to both: enabled and disabled, but I'm still hearing nothing via the Apollo even though the Kemper output is being recorded; doubtless it's something I am not doing that I should lol! Thanks for your help.

    Terry

    Have you set up an aggregate device in the Apple Audio Midi application?

    I have one set up but I can't remember if it was strictly necessary for the scenario you require.

    Quote from Wheresthedug

    Have you set up an aggregate device in the Apple Audio Midi application?

    I have one set up but I can't remember if it was strictly necessary for the scenario you require.

    I haven't Alan but bizarrely, late last night, having toggled direct monitoring on and off in Logic a few times it worked as I'd hoped i.e. Profiler as input and Apollo as output and heard the guitar through the monitors as I recorded. Just had to play with buffer sizes but all good.

    I am going to also play about with the Kemper direct into Apollo again to A/B things, but thanks ever so much for your help with this.

    Have a great day.

    Terry

    • Official Post
    Quote from Wheresthedug

    Have you set up an aggregate device in the Apple Audio Midi application?

    I have one set up but I can't remember if it was strictly necessary for the scenario you require.

    We advise against aggregating devices. Especially in combination with software monitoring. The latency adds up too much, and in most cases, it is not necessary.

    Quote from G String

    We advise against aggregating devices. Especially in combination with software monitoring. The latency adds up too much, and in most cases, it is not necessary.

    That's interesting.

    Latency from my MOTU is 4ms round trip latency from the profiler is 10.5ms round trip. The aggregate device latency is also 10.5ms.

    I want/need to use the MOTU as my output device so an aggregate device gives that option plus the option for USB input from the Kemper without any cable swapping.

    • Official Post

    It's nice to see that it's working for you. In fact, your setting (two interfaces, different latencies) clearly shows what many users seemingly do not understand: device aggregation means that the interface with the lower latency "inherits" the higher latency. Without going into all the details there can be scenarios where you get a lot of latency you otherwise wouldn't have. That's one of the reasons why we advise against using device aggregation in a recoding situation on macOS.