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37582[Nature Recordists] Re: EQ audio plugin

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  • Rob Danielson
    Jun 23, 2009
      At 9:43 AM +0000 6/22/09, justinasia wrote:

      >Rob wrote:
      > > I'm sorry that I can't remember who it was at the moment, but one
      >> alert list reader suggested an EQ app that had unlimited bands of EQ
      >> (or many) that sounded very similar to Eqium to me.
      >I searched. Was it apulSoft apEQ ?
      >US$74.88. Seems to be good. You can also zap really narrow sections
      >of frequency - they call it "band reject". I expect that can be
      >useful. Does anyone have opinions of this plugin? Perhaps it is "the

      That's it, Justin. Thanks for searching down Paul's discovery.

      I've been wanting to compare apEQ to Eqium 2.0 (now sold as
      UNIQUEL-IZER for considerably more than ApEQ)

      To conduct an A/B test, I made a recording of the dusk interactions
      in a rural setting including car traffic and hubbub from a village a
      mile away in order to create a sample of a recording that would
      likely benefit from EQ.

      As I've mentioned on the topic of field recording equalization
      before, "I never met a lower octave I did not like." I rarely use
      "roll-off" filtering of the type Justin is experimenting with because
      I feel that I can better address the most exaggerated frequencies,
      individually, with narrow-ish parametric EQ "curves." Its
      time-consuming, but I feel this technique preserves more of the
      fundamentals of the sound waves that are helpful in recreating useful
      overtones in the lower mid-range.

      Here's the comparison as a 7mb QuickTime movie.
      http://tinyurl.com/lerjgp Click on the image to jump right to the
      movie. The soundtrack is full resolution (16 bit/48K).

      A few observations:

      (1) I'm really surprised at how differently the two EQ plugins affect
      the recording-- especially within the range of 80 Hz to 500 Hz. The
      result of attenuation made with a single apEQ "peak" curve has more
      impact. Even with very careful "Q" or width settings, apEQ tended to
      remove a little more of the "body" and adjacent tones than I'd prefer
      at times. However, the difference is subtle and only shows up after a
      more complex curve is in effect. With a wider boost/cut range of 40
      dB, its easier to use a + dB "peak" in apEQ to audibly locate an
      offensive tone or bandwidth than with Eqium. Recordists who like to
      attempt to "remove" man-made drone sounds as might like the greater
      expediency of apEQ. I found that I could get impressive improvement
      in the field recordings I experimented with as few as 5 to 8 curves.
      apEQ might be preferable when needing to quickly but effectively
      equalize a recording. I'll probably stick with Eqium when I'm trying
      to coax "space" out of an ambience recording, but the sound quality
      differences are curious and worth more experimentation for sure.

      (2) The controls of apEQ are fantastic. After you create a Peak EQ
      curve by clicking anywhere on the master curve, you can click on one
      control variable in the floating box to drag-change that setting
      without affecting the others. This is very handy for fine tuning Q
      and the Gain after you find the frequency. I also like the "bypass"
      button for A/B comparing just one setting. I didn't find a "B" buffer
      option for comparing two sets of EQ's; maybe I missed this.

      (3) The superimposed FFT display of apEQ is also fantastic-- I found
      that I referred to it a lot. (I have to open a separate FFT window
      when I used Eqium and this clutters the screen and is not as visually

      (4) I could not find a master gain knob in apEQ. Also, I couldn't
      find a global balance setting. Stereo mic pairs usly need some
      tweaking. Of course, both of these corrections can be achieved with
      the plug setting document. Or, maybe I missing them too?

      (5) I'm not sure how many bands of EQ one can create with apEQ but it
      seems like plenty. (One can create 99 bands with Eqium.) apEQ
      probably taxes the CPU more than Eqium but the preview audition mode
      seemed very responsive on my 2004 model 2GHz Dual G5 PowerPC Mac.

      I would definitely give the free demo of apEQ a try if you are
      contemplating spending some money on EQ. Rob D.


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