Spectrum Analyzers

Discussion in 'Mixing and Mastering' started by talkytina, Feb 19, 2015.

  1. talkytina

    talkytina Newbie

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    I know a lot of ppl love Voxengo Span. But I always get a different readout compared to everything else every time I use it. Am I neglecting to set something up properly on it? I'm using it straight up default. For example the current proj Im working on, Ableton Spectrum, Ozone 5 & Fabfilter Pro Q all show similar waveforms with Spectrum being the most sensitive. They all show the track to be heavy on the low freqs. Meanwhile Span tilts more towards the upper freqs. Also, one of the instruments I soloed had the freq wave edge about 4k @ -72 on Spectrum but only 1.5k @ -72 on Span.
     
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  3. fiction

    fiction Audiosexual

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    Can you post screenshots so we can see what you're talking about?
     
  4. globalpeace

    globalpeace Noisemaker

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    If you look at the fabfilter pro q 2. it shows you from 6db upto to 30Db Spectrum View (look at the top right). Don't get confused with that.
     
  5. Baxter

    Baxter Audiosexual

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    You can adjust the slope (dB/oct) in SPAN and Pro-Q/Q2. Click the Edit-button in SPAN. Default is 4.50 in the newer versions of SPAN (it used to be 3 on the older versions). Set it to zero in SPAN and Pro-Q/Q2 if you need to. Run some white noise through it and see what happens.

    ^@Calvin: It's dB, as in Alexander Graham Bell. Don't get confused with that.
     
  6. globalpeace

    globalpeace Noisemaker

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    Thank you for correcting *yes*
     
  7. talkytina

    talkytina Newbie

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    I can't seem to post a pic on here. Keeps showing error. So... http://i849.photobucket.com/albums/ab55/jkspade/Rand/20150219_132424.jpg

    @baxter that's the thing, the whole curve just looks different. The upper ends are bumped up.
     
  8. Baxter

    Baxter Audiosexual

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    What's the slope (and "type" and "average time", etc) in SPAN? Click the edit button.
     
  9. talkytina

    talkytina Newbie

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    Type: RT AVG
    Block size: 2048
    Overlap 50.0
    Avg time 2000
    Freq low 20.0
    Freq High 20.0K
    Range low -72.0
    Range high -18.0
    Slope 4.50
     
  10. turbo

    turbo Ultrasonic

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    How can i know which are the resonant frequencies i've to cut down? I know to check the spectrum peaks and cutting narrow but every time i do bad decisions........ :(
     
  11. boomoperator

    boomoperator Rock Star

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    How's your room? The Spectrum view informs about the audio material, but it's sound is highly influenced by a room. If your room isn't good, your EQ-ing won't be either.
    Besides that, cutting down spectrum peaks from a graphic is not the way. They're not 'bad' by default. Just treat an analyser as an informing tool, then listen to the mix and the individual tracks and make your changes. Not necessarily by using an EQ.
    A well known method of finding & cutting away offending frequencies using an EQ: raise the gain of a specific band, sweep-through the sound or mix with the frequency dial. On finding the offending frequencies, take down the gain to a negative value and raise the Q. A typical sound or mix can have several of those 'notches'.
     
  12. turbo

    turbo Ultrasonic

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    Unfortunately untreated room, just one panel back of the monitors ;(
    Thanks for advice :wink:
     
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