---

Equalization (EQ) is often hailed as one of the most transformative tools in an audio engineer's arsenal, capable of dramatically reshaping the tonality of any sound. Yet, for many, it remains a source of frustration and self-doubt. The sheer number of frequencies, the subtle differences, and the fear of making the "wrong" cut or boost can be paralyzing. SonicScoop's Justin Colletti recently tackled this common challenge, offering a refreshing perspective on how to truly hear EQ, not just manipulate numbers. His core message: you don't need perfect pitch or hyper-specific frequency recall to achieve stellar mixes. Instead, a progressive, band-based approach to listening is your ultimate breakthrough.

Beyond the Numbers: The EQ Mindset Shift

One of the biggest misconceptions in audio engineering is the belief that a good mixer must instantly identify the difference between, say, 405 Hz and 408 Hz. Colletti emphatically states this isn't true. While precise frequency knowledge can be beneficial, the most crucial aspect of effective EQ is understanding general frequency areas and making broad, impactful changes.

He critiques the common beginner technique of sweeping a heavily boosted, narrow EQ filter to find "ugly" frequencies. While this can offer some initial insight, it often leads to what he calls "Swiss cheese EQs" – numerous tiny, often ineffective cuts that don't fundamentally improve the sound. Boosting a frequency by +12 dB with a narrow Q will make any frequency sound bad, leading to misguided decisions.

The reality, Colletti explains, is that "you do not have to get it perfect to make a strong, positive difference." Multi-platinum mixing engineers, like his friend Jeff Ellis (The Neighbourhood, Doja Cat), often admit they don't know exact frequency numbers but possess an innate ability to identify general problem areas. The goal is to be "close enough" in the right general location, not to pinpoint a single Hertz.

The Power of Progressive Listening: Mastering Frequency Bands

Colletti's breakthrough method for developing your EQ ear is a progressive, "divide and conquer" strategy, breaking the vast frequency spectrum into manageable, distinct bands. This approach builds confidence and accelerates your ability to identify problematic or desirable tonal characteristics.

Starting Your Journey: Three Core Zones

Almost everyone can distinguish between lows, mids, and highs. Justin suggests beginning here: * Lows: Around 100 Hz * Mids: Around 1,000 Hz (1 kHz) * Highs: Around 10,000 Hz (10 kHz) Practicing with broadband noise or tones at these three points is the foundational step.

Expanding Your Horizon: Four Bands of Clarity

Once comfortable with three zones, the next step is to expand to four by splitting the broad "mids" into two: * Lows * Low Mids: Approximately 200 Hz to 1,000 Hz * High Mids: Approximately 1,000 Hz to 5,000-6,000 Hz * Highs

Deeper Nuances: Six Distinct Regions

Further refinement involves splitting the lows and highs, creating six distinct bands: * Sub Frequencies: 20 Hz to 80-90 Hz (the deep rumble) * Upper Bass: 80-90 Hz to 200 Hz (the punch and warmth) * Low Mids: 200 Hz to 1,000 Hz * High Mids: 1,000 Hz to 5,000-6,000 Hz * Lower Highs: 5,000 Hz to 8,000 Hz (presence, clarity) * Upper Highs: 10,000 Hz and above (air, sparkle)

The 7-Band Sweet Spot: Unlocking 80% of the Benefits

Colletti identifies the ability to distinguish seven bands as the point where you gain "80% of the benefits" of refined EQ hearing. This involves adding a crucial "Center Mids" band: * Sub Frequencies (20-90 Hz) * Upper Bass (90-200 Hz) * Low Mids: 200 Hz to 600 Hz (woody, thick, can be muddy or warm) * Center Mids: 600 Hz to 2,000 Hz (a distinct vibe, often housing fundamental tones) * Upper Mids: 2,000 Hz to 4,000 Hz (intelligibility, brightness, edge) * Lower Highs: 5,000 Hz to 8,000 Hz * Upper Highs: 10,000 Hz and above

By mastering these seven bands, you'll be able to quickly narrow down where an issue or desired quality lies, allowing for more targeted and effective EQ moves. Even if you don't know the exact number, knowing it's in the "lower end of the low-mids, maybe around 250 Hz," provides an excellent starting point for experimentation.

Developing Your "Sense Memory": Practice & Tools

Developing this skill requires focused practice. Colletti suggests:

  1. "Blind" Listening: Use analog-style EQs or plugins that don't display a frequency graph. This forces you to rely purely on your ears and build "sense memory."
  2. Double-Checking with Visual EQs: Tools like FabFilter Pro-Q3 or iZotope Ozone, with their graphical displays, are excellent for verifying your sonic guesses after you've made them, rather than dictating your moves. This helps solidify the association between sound and frequency range.
  3. Guided Exercises: While self-directed practice is valuable, structured listening exercises with different types of audio (tones, white noise, individual instruments like drums, bass, vocals, acoustic guitar, and full mixes) can significantly accelerate learning.

Colletti himself can distinguish at least 13 different frequency bands instantly, but he emphasizes that this level of refinement is a long-term goal, not a starting point.

The Professional's Perspective: A Journey, Not a Sprint

Learning to hear EQ effectively is akin to physical training. You don't start by lifting the heaviest weight; you begin with manageable loads and progressively increase them. Similarly, you start with three bands, then four, then six, and ultimately aim for the powerful seven-band distinction. This incremental progress builds confidence and makes the daunting task achievable.

It's crucial to remember that great mixes don't always come from perfect frequency recall. Confidence in your ability to identify general areas is far more valuable. This progressive approach empowers engineers to make more informed decisions, sweep less, and create mixes that sound polished and professional without getting lost in the numbers.

Key Takeaways

Focus on General Areas, Not Exact Numbers: Effective EQ is about broad strokes in the right frequency region*, not pinpointing specific Hz values. * Avoid Excessive Sweeping: Over-boosting narrow filters can be misleading and lead to ineffective "Swiss cheese" EQs. * Adopt a Progressive Listening Strategy: Start by identifying 3 broad bands (Lows, Mids, Highs), then expand to 4 (splitting Mids), then 6 (splitting Lows and Highs), and finally aim for the 7-band system (adding Center Mids). Develop "Sense Memory": Practice with "blind" EQs and use graphical EQs as a verification tool after* making a sonic judgment. * It's a Journey: Like any skill, mastering EQ takes time and progressive practice. Don't be discouraged if you can't hear 13 bands immediately; aiming for 7 bands provides most of the practical benefits.

Watch Original Video