Electric Guitars
Electric guitars are mid-range instruments. Their useful frequency range is roughly 80 Hz–6 kHz, with most of their character living in the 200 Hz–4 kHz range. High-pass at 80–100 Hz to remove rumble. Consider a gentle low-pass at 8–10 kHz unless the guitar needs top-end air for a specific sound.
Doubled Guitars
Pan them hard left and right. The width comes from the performances being slightly different — different takes, different timing, different tonal variations. Don’t duplicate one performance and pan the copies; record two separate takes. The micro-variations between takes create genuine width that a copy-and-paste can’t replicate.
Compression
A gentle compressor tames pick attacks that poke out. Or boost the attack with a transient designer if you want the guitar more percussive and forward. Electric guitars are already compressed by the amp — don’t over-compress in the mix.
Distorted Guitars
Heavily distorted guitars are already harmonically dense. EQ is more about carving them to fit the mix than about adding character. Cut low end aggressively (HPF at 100–120 Hz), cut the 200–400 Hz range to reduce mud, and be careful about boosting presence (3–5 kHz) — the distortion already fills that range.
Clean Guitars
Clean electrics are more dynamic and have a wider frequency range. They benefit from chorus or subtle modulation for width, and from careful compression to manage the dynamic range of fingerpicked passages.
Acoustic Guitars
Acoustic guitars are brighter and more dynamic than electrics. They often need more high-pass filtering (100–150 Hz) because proximity effect from close-miking adds bass boom. A gentle high shelf boost at 8–12 kHz brings out the string shimmer. Compression keeps the dynamics under control for fingerpicking or strumming that varies in intensity.
In a band context, acoustic guitars need aggressive frequency carving. They have content from 80 Hz to 15 kHz, and they’ll compete with everything: the bass in the low end, the electric guitars in the mids, the vocal in the presence range, the cymbals up top. Cut them down to the frequency range where they serve the arrangement and get everything else out of the way.
Keyboards
Piano
Piano occupies a huge frequency range — a grand piano spans from about 27 Hz to over 4 kHz in fundamentals, with harmonics extending much higher. Don’t let it fill all of that in a mix.
In a band context, high-pass the piano at 100–200 Hz (let the bass handle the low end) and cut slightly in the 2–4 kHz range (let the vocal handle the presence). A stereo piano recording is often too wide for a dense mix — narrow the stereo image to give other instruments room.
A solo piano is a different story. Let it breathe. Use the full range and full width.
Rhodes and Organ
Rhodes piano is one of the most naturally mix-friendly instruments — it sits in a defined frequency range, responds beautifully to subtle effects (phaser, chorus, tremolo), and doesn’t compete aggressively with other instruments. A slow phaser on a Rhodes is a classic sound.
Organ can be tricky because of its harmonic content — a B3 with a Leslie cabinet produces dense harmonics across the full spectrum. High-pass, manage the low-mid buildup, and be aware of the Leslie’s stereo modulation (which can be too wide in a dense mix).
Synths
Pads
Pads provide harmonic cushion. They should fill space without competing with lead instruments. High-pass aggressively (200–300 Hz in a dense mix), low-pass to remove unnecessary brightness (6–10 kHz), and use sidechain compression to duck when the vocal or lead instrument plays.
Stereo width is the pad’s strength — it fills the panorama where other instruments aren’t. But too much width, and it masks everything else.
Lead Synths
Treat a lead synth the way you’d treat a vocal — it needs its own frequency pocket and its own space in the stereo field. If it’s competing with the vocal, one of them needs to move.
Virtual Instruments
Extra-Wide and Huge Bandwidth Instruments
Some instruments — a stereo synth pad with sub-bass content and ultra-high harmonics, or a fully effected guitar with chorus and reverb — try to occupy the entire mix. They’re everywhere: all frequencies, full stereo width.
These instruments need the most aggressive management. Decide what role the instrument plays and cut everything else:
- Is it a harmonic cushion? High-pass at 200 Hz, low-pass at 8 kHz, narrow the stereo field.
- Is it a rhythmic texture? Keep the transients, cut the sustain, reduce the stereo width.
- Is it a feature moment? Give it the full range, but only for that moment — automate the processing for the section where it’s featured.
What to Practice
- Record two separate takes of the same guitar part. Pan them hard left and right. Compare the width to a single take duplicated and panned.
- High-pass an acoustic guitar in a band mix, starting at 60 Hz. Push the HPF higher until the guitar sounds thin, then back off. Note how much low end you removed without losing the instrument’s character.
- Take a stereo synth pad and narrow its stereo image to 50%. A/B with full width. Listen to how the narrower version opens up space for other instruments.
- EQ a piano to fit in a dense mix: HPF at 150 Hz, cut at 3 kHz. A/B with the unprocessed piano and listen in the context of the full mix.
