Kick Lab 04 · 12 min

Frequency Lab

Sweep an EQ band, change gain and bandwidth, and connect spectral movement to audible thump, knock, click and mud.

Controlled experiment

Change one cause. Hear the result.

Before moving a control, predict what will change. Use the play controls to compare at a comfortable level.

Audio starts only when you press a play button.

120 Hz
Centre frequency of the EQ band.
0 dB
Boost or cut at the centre frequency.
1.2
Higher Q means a narrower band.
42%
Keeps the source anatomy visible during EQ changes.
What changed

Move one control and listen for the relationship.

EQ responseUpdates with the controls
EQ response is ready. Move a control to inspect the change.
Resulting spectrumUpdates with the controls
Resulting spectrum is ready. Move a control to inspect the change.

Attention guide

Listen for these three things.

  • 130 to 70 Hz depth and room interaction
  • 280 to 180 Hz body
  • 32 to 8 kHz definition

Guided practice

Three experiments worth doing.

Do them in order. Reveal “What to notice” only after you have described the result in your own words.

  1. 01

    Exaggerate, then retreat

    Set Gain to +12 dB and sweep slowly. When you identify the quality, reduce gain toward zero.

    What to notice

    Exaggeration is a search method, not usually the final setting.

  2. 02

    Cut the cause

    Set 220 Hz, Q 1.2 and compare 0 dB with −6 dB.

    What to notice

    A broad low-mid cut can clarify one source but may also remove useful body.

  3. 03

    Narrow is not precise by default

    Compare Q 1 and Q 10 at the same centre and gain.

    What to notice

    A very narrow move affects less spectrum but can sound resonant or unnatural.

Check your model

What should determine the frequency you EQ first?

Choose the answer that explains the cause, not merely the symptom.

Close the loop

Can you explain the result without the controls?

If you can name the cause, the audible change and the musical tradeoff, the concept is ready to transfer into your own session.