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  • Audio EQ balance with pink noise?

  • Chris Wright

    July 1, 2020 at 7:13 am

    What do you guys think about playing back pink noise on set to capture the ambient EQ response of both the room and the different mics so that you can use EQ match in Izotope RX 7 to match any room or mic?

  • Ty Ford

    July 1, 2020 at 7:54 am

    Hello Chris and welcome to the Cow Audio Forum.

    The position and dispersion fo the pink noise source and the position of the mics will effect some difference in the EQ reading because a room is basically a large mechanical filter.

    Room tone taken in different parts of a room can also be very different due to local structures and noise sources.

    Give it a test and let us know how it goes.

    Regards,

    Ty Ford
    Cow Audio Forum Leader

    Want better production audio?: Ty Ford\’s Audio Bootcamp Field Guide
    Ty Ford Blog: Ty Ford\’s Blog

  • Chris Wright

    August 10, 2020 at 4:26 pm

    i was testing some auto EQ plugins to see if I could get better audio and realized that you could simply compare your audio against pink noise and EQ out the interference.
    1. copy pink noise into mono left channel LUFS -23
    2. copy post audio into mono right channel -23 LUFS (they both have to be the same loudness)
    3. mixdown to mono to create destructive interference
    4. view Frequency analysis at 256 FFT size to view interference
    5. while playing back, use parametric EQ to make a flat response.

    This standardized my mics.
    Now, I just need to automate this.
    I tested Gullfoss and Hornet Thirty-One(got closer)
    but these are made for mastering, not for fixing bad audio. Manual was still better.
    I also tried using RX against generated internal pink noise but RX seemed to like white noise better for its algorithm.

  • Ty Ford

    August 10, 2020 at 11:35 pm

    Excellent, Chris,

    Thanks for reporting back!

    Regards,

    Ty Ford
    Cow Audio Forum Leader

    Want better production audio?: Ty Ford\’s Audio Bootcamp Field Guide
    Ty Ford Blog: Ty Ford\’s Blog

  • Sophia Lee

    August 14, 2020 at 6:53 am

    Pink noise is a type of noise that we perceive as being balanced throughout the frequency spectrum. This means that, to our ears, the low frequencies sound as loud as the high frequencies. People have noticed that a well-mixed song has a similar shape to pink noise on a spectrum analyzer. I put a great mix through an analyzer to show you that.

    1. Turn down the output of your audio interface so you don’t blow out your speakers, headphones or ears.
    2. Add a tone/signal/noise generator plugin to a spare track in your DAW. In most DAWs, you’ll find this tool in your stock plugin library.
    3. Set the plugin up to play pink noise at around -12dB.
    4. Loop the section of your song where most of the tracks are playing (usually the chorus).
    5. Solo the pink noise track. Keep it soloed throughout this process.
    6. Solo the first track in your song.
    7. Increase the fader level on this track until it can barely be heard over the pink noise.

    Mixing with pink noise won’t help you make better-sounding music.

  • Ty Ford

    August 14, 2020 at 11:33 am

    Well said, Sophia Lee!

    Thanks for stopping by!

    Regards,

    Ty Ford
    Cow Audio Forum Leader

    Want better production audio?: Ty Ford\’s Audio Bootcamp Field Guide
    Ty Ford Blog: Ty Ford\’s Blog

  • Chris Wright

    August 24, 2020 at 8:36 pm

    I did find a really amazing use for white noise, to find the harmonic distortion frequencies of mics. Record white noise with the mic, then use that sample to remove learned noise. it got rid of an extra 30% noise without hurting the dialogue. i’m sure that doing some of this before you even hit record, ie. an in-lined mixer will help the sound sample’s lattitude especially if you’re not shooting 96khz 24 bit.

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