Audio Null Tests, Examples , Results , Metering

Discussion in 'Microphones (live or studio)' started by audiokid, Nov 7, 2011.

  1. audiokid

    audiokid Chris Staff

    Mar 20, 2000
    BC, Canada
    Home Page:
    running a null test

    General consensus, null tests are reported to be an accurate way to compare results. How do you make sure something really does null or not then? I've read most metering applications have issues to provide sufficient results for null tests. Example: the on board metering in many DAW's ignores all levels below a certain point. I found out that the only REALLY good metering/measurement is WaveLab and a few others. It displays all the way down to -144 dB. If this is true, the results of some null tests may not be true.
    What do you use?

    How convincing and how useful are phase cancellation comparisons?

    What are some null comparisons worth doing?

    • running sources through different outboard compressors, and making a hard bypassed copy to phase reverse against the processed / compressed sound
    • How two DAW's compare ( pay attention on pan law)
    • Equipment Noise
    Some links to metering:

    • rnd | inspector xl
    • Real-time audio spectrum analyzer plugin (AU, VST) - SPAN - Voxengo
    • Bitter | Stillwell Audio - It's About The Sound

    Do you do null tests for mixing or mastering?

    Heres some great info at DIY

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