Brickwall filtering {high pass, low pass }

Discussion in 'Mixing and Mastering' started by Kick Radio, Sep 21, 2014.

  1. Kick Radio

    Kick Radio Newbie

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    i know its a noob question but i am a noob to mixing and mastering
    Whats the best brick-wall / digital eq that gives clean cuts like high-pass and low-pass
    i'v been using SSL duende channel strip but they replicate analog so its not a cut were i want it its more like an incremental cut till where want it
     
    Kick Radio, Sep 21, 2014
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  2. Ads Master

    Ads Master

     
  3. Catalyst

    Catalyst Audiosexual

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    FabFilter Pro Q 2 is good for the job as it's very surgical. Great eq. *yes*
     
    Catalyst, Sep 21, 2014
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  4. fuad

    fuad Producer

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    +100000 for Fabfilter, one of the best EQ's around
     
    fuad, Sep 22, 2014
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  5. junh1024

    junh1024 Rock Star

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    I'd like to say Izotope Ozone 5 EQ: Brickwall lopass/hipass has slightly sharper filters than ProQ2, from my preliminary tests.
     
    junh1024, Sep 22, 2014
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  6. ArticStorm

    ArticStorm Moderator Staff Member

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    ozone sharper? Q2 has 96dB HP/LP.
     
    ArticStorm, Sep 22, 2014
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  7. junh1024

    junh1024 Rock Star

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    Yes.

    I know 96dB/O sounds like a lot, but since Octave=doubling in frequency, a 96dB/O Lopass @4K will only go to -96dB at (2x4K=) approx 8K.

    ProQ2 has a transition band of a few K @4K in 0L mode, same in LP mode.

    EQ5 has a transition band of 550hz @4K in Analog mode, 100hz in LP mode.

    ProQ2 0L

    [​IMG]

    EQ5 A
    [​IMG]

    ProQ2 LP
    [​IMG]


    EQ5 LP
    [​IMG]

    NB: In ProQ2, the filter dB scale is on the left, the audio dB scale is on the right. In EQ5, on the left is the audio dB scale, on the right is the filter dB scale.


    Anyway, with MOST EQs, even free ones and DAW builtin, by applying any lowpass or hipass, you should get a cleaner sound. Sharpness could play a small part, or a gentle shape could do well, or acceptable.
     
    junh1024, Sep 22, 2014
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  8. superliquidsunshine

    superliquidsunshine Guest

    Wow, who knew?
     
    superliquidsunshine, Sep 22, 2014
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  9. transporter1333

    transporter1333 Member

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    Nice post
    Interesting answers....
    :wink: :wink:
     
    transporter1333, Sep 22, 2014
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  10. fuad

    fuad Producer

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    @junh1024

    Excellent comparison and extremely useful advice. Thank you.

    Although having said that I do think the uses for brickwall filtering would be very limited and cause things to sound unnatural, but if you're looking for absolute sharpness, then there you it
     
    fuad, Sep 22, 2014
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  11. Catalyst

    Catalyst Audiosexual

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    That's what I was thinking, aren't gentle slopes more musical? We're talking sharp attenuation here.
     
    Catalyst, Sep 22, 2014
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  12. Baxter

    Baxter Audiosexual

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    Christian Budde's Rubberfilter
    Steepest filter I know (384dB/oct). Freeware. Not to be automated/modulated.
    http://www.savioursofsoul.de/Christian/vst-plugins/eqs-filters/
    [​IMG]
     
    Baxter, Sep 22, 2014
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  13. Guitarmaniac64

    Guitarmaniac64 Rock Star

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    Wow that last picture looks more like a what a gate does than a passing filter use that curve or shall i call it cut? on a HP and it IS a gate.
     
    Guitarmaniac64, Sep 22, 2014
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  14. mild pump milk

    mild pump milk Russian Milk Drunkard

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    rs-met engineersfilter
    it's free
    it has a lot of filter types, etc.
    there is one filter type that cuts as flat as brickwall is. Like that -> |___
    High order (20), low ripple, high rejection
    type: elliptic

    I've never seen brickwallier filter than this one.
    If you're high-cutting at 1 kHz, there will be about 1030 Hz at -120 dB......
    But will be a lot of ringing (and it is a minimum phase only)
     
    mild pump milk, Sep 22, 2014
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