Aux Mix output level down about 25 dB from LRmain

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This topic contains 9 replies, has 5 voices, and was last updated by Profile photo of Scott Scott 6 months, 2 weeks ago.

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  • #105772
    Profile photo of Tom
    Tom
    Participant

    We are using SQ-5. Aux Mix 6 mostly follows the main mixer, with a few independent mics only to Aux 6
    (which we’re not using for this test). Aux 6 goes (via XLR outputs) to our video switcher, Main to the PA speakers.

    Most of the inputs to the aux mix are set post-fader, with those aux channel faders set up to the zero level.
    The assumption here being that the level into Aux 6 should track those faders on the Main mixer. We also have
    the output level of Aux 6 set up to the zero dB. point. LRMain output fader set up at about 0 dB level.

    The inputs seem fine, but the output level from Aux 6 is about 25 dB down from the main output level, using LED meter PAFL
    on the Aux 6 output, as compared to the levels from LRMain. Is this normal? Is there something easily overlooked on setup
    that reduces the aux output level by a large amount?

    — Tom

    #105778
    Profile photo of Mike C
    Mike C
    Participant

    Do you notice that much level difference on the actual output feeding your video switcher?

    Are you applying a lot of processing to the output of aux 6?

    #105779
    Profile photo of ozdoc
    ozdoc
    Participant

    Check that there isn’t a compressor/ limiter on Aux 6 main output.

    #105787
    Profile photo of Scott
    Scott
    Participant

    What is the Aux master set at?

    #105790
    Profile photo of Tom
    Tom
    Participant

    Thanks for the responses…

    1. There is no other instrumentation available for measuring levels – we are using the twin columns of LEDs to
    the right of the touch screen to indicate level. The comparison here is those LED’s: LRmain vs. Aux 6 output PAFL.

    2. There is no output processing, compression, or limiting on aux 6 output.

    3. The Aux 6 master out level is set up at 0 dB (matching the LRMain output level setting).

    — Tom

    #105797
    Profile photo of Mike C
    Mike C
    Participant

    For a test set up the signal generator with test tone and send that to LR and Aux 6
    then see what the level shows on the meter.

    #105798
    Profile photo of Mfk0815
    Mfk0815
    Participant

    Did a simple test. Used a signal generator and send the signal from one input channel to Aux6, post fader and MainLR. all send fader, the one for MainLR and the one for Aux6 are set to 0 dB. open the master fader for MainLR and Aux6 and the meters are showing the same level (as expected). Then I did a further test and assign Aux6 and Main LR to some output sockets and patch them back to some input sockets, set the gain of the two inputs to the same value. The result was the same level on both input channels. All this tests were done with Firmware 1.5.3.

    By the way: “There is no other instrumentation available for measuring levels”. There is a Meters screen available. There you can see the levels of all mixbusses side by side.

    #105800
    Profile photo of Tom
    Tom
    Participant

    Thanks for the good suggestions! I will use the signal generator function to trace down the levels,
    and report back in a day or two.

    — Tom

    #105816
    Profile photo of Tom
    Tom
    Participant

    Using the signal generator, everything seems to work like it should. The generator was assigned to Grp1,
    then mixed it to LR and to Aux6, and the levels are all correct and track on the meters.

    However we still have the issue that when using the XLR inputs, the LR and Aux6 outs are different by 25 dB.
    I am pretty new with the SQ5, so I’m sure something is setup incorrectly, just cannot figure out what it is.
    The direct XLR mic inputs are set post-fader to Aux6, and Aux6 has all faders set at zero dB in and out.
    As the faders to LR are changed everything tracks up and down properly except for the composite
    output level discrepancy.

    Is there some other fader that needs to be set correctly that has been overlooked?

    — Tom

    #105822
    Profile photo of Scott
    Scott
    Participant

    Is your output master a member of a DCA? If so that could be the issue.

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