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LX Audiolabs edited this page Jul 6, 2026 · 1 revision

Aether — Headphone Monitoring

Harman EQ correction + spatial crossfeed for accurate headphone mixing.

What is Aether?

Aether is a headphone-only monitoring tool that does two things:

  1. Harman Curve EQ — corrects typical headphone coloration (hyped bass, scooped mids, harsh highs)
  2. Crossfeed — simulates natural L/R bleed like speakers, reducing ear fatigue

Built for electronic music producers. Headphones lie about sub-bass, stereo width, and high-end harshness — Aether un-lies them so your mix translates to club systems and streaming.

Where to Place It

🔴 Monitoring FX chain ONLY — never on the Master or track inserts.

DAW Location
Reaper Monitoring FX slot (View → Monitoring FX)
Bitwig Post-master monitor bus (dedicated track routed to hardware outs)

Aether corrects what you hear, not what you print. On the Master it prints the correction into your bounce — destroys translation.

Harman EQ — 5 Bands

Factory-calibrated Harman target curve. Leave defaults; adjust only for your specific headphones.

Band Type Freq Q Electronic Music Use
1 Low Shelf 105 Hz 0.7 +1–2 dB if sub/kick feels weak on headphones vs club
2 Peak 300 Hz 1.0 +1 dB for warmth on pads; −1 dB if low-mids muddy the rumble
3 Peak 1200 Hz 1.0 Usually leave neutral — your midrange truth reference
4 Peak 4000 Hz 1.0 −1 to −2 dB if hi-hats/percs too sharp
5 High Shelf 10 kHz 0.7 −1 to −2 dB if fatiguing in long sessions

Harman Blend: 100% = full correction (default). Reduce to 70–80% only if your headphones are already close to neutral.

Custom Headphone Correction via AutoEQ.app

Aether ships with a universal Harman curve. For headphone-specific correction:

  1. Go to autoeq.app
  2. Search your headphone model (e.g. Sennheiser HD 650, Beyerdynamic DT 990)
  3. Select Parametric EQ → copy the values
  4. Enter FREQ, GAIN, and Q per band manually into Aether

Example from AutoEQ:

Filter 1: ON LS Fc 105 Hz Gain 3.3 dB Q 0.70
Filter 2: ON PK Fc 300 Hz Gain −2.1 dB Q 1.0

→ Band 1: FREQ 105 Hz, GAIN +3.3 dB, Q 0.70

AutoEQ import is manual — copy values by hand, not automatic.

Crossfeed — The Key Feature

Headphones isolate L and R completely — unnatural. Crossfeed simulates interaural bleed (like speakers in a room), reducing ear fatigue and improving stereo judgments. Critical for electronic music: wide pads, ping-pong delays, hard-panned percussion sound artificially wide on headphones.

Control Range Default What it does
ANGLE 30–75° 60° Virtual speaker width — 30°=in-ear, 60°=over-ear, 75°=nearfields
AMOUNT 0–100% 0% Crossfeed intensity — start at 0 and dial up
REALISM 0/1/2 0 (Standard) Interaural time delay: Standard / Lifelike / Hyperrealistic

Recommended Settings

Use case Angle Amount Realism
Precise mixing (kick/sub balance) 60° 15–20% Standard
Long sessions (arrangement, sound design) 60° 25–30% Standard
Checking stereo width (pads, delays, atmos) 60° 0% —
Mastering prep (translation check) 60° 20% Lifelike

Toggle AMOUNT to 0% regularly — if your mix falls apart without crossfeed, your stereo image needs work.

Output & Metering

  • Output Gain: Leave at 0 dB — your DAW controls monitor level.
  • Input Peak Meter: Bottom-right. Green/amber = good, red = clipping.

Typical Workflow

Session Start

  1. Place Aether on monitor track
  2. Harman Blend 100%, Crossfeed Amount 25%, Angle 60°
  3. Listen — does it feel more natural?
  4. Fine-tune: too bassy → Amount 20%. Too dull → Band 4 EQ +1 dB.

Long Session (2+ hours)

Amount 20–25%, Realism Standard — relaxed monitoring without fatigue.

Reference Check

Amount 0% (crossfeed off, EQ stays) → hear raw headphones → switch back.

Tips

  • Calibrate once, leave it. Daily changes confuse your ears.
  • Quiet room → less crossfeed (Amount 20%); Loud environment → 25–30%.
  • Headphone change = reset. Start Amount 0% and dial up to 25%.
  • Bypass regularly for a raw-headphones reality check.
  • AutoEQ.app users: Manually copy FREQ/GAIN/Q values into Aether's bands.

Known Limitations

  • Universal Harman curve — not headphone-brand-specific. Adjust manually.
  • Crossfeed is simulated — mathematical model, not real acoustics.
  • No individual-ear EQ — both ears get the same correction.
  • SNAP not available in Aether (unlike Equilibrium/Meridian).

System Requirements

⚠ Modern GPU required. LX plugins use GPU-accelerated rendering (Iced + wgpu) for real-time displays.

Component Minimum
Windows Windows 11 64-bit
macOS Apple Silicon (M1–M4)
Linux Modern distro, Vulkan-capable GPU + up-to-date Mesa drivers
GPU DirectX 12 / Vulkan / Metal — GPU from ~2015+
DAW CLAP-compatible (Reaper, Bitwig, Studio One, FL Studio)

Not supported: Windows 10 (blank displays), old Intel Macs, Linux on pre-2015 GPUs (crashes). There is no software fallback — the GPU pipeline is mandatory.

FAQ

Can I use Aether on the Master? No. Monitoring only. On the Master it destroys your mix.

Should Blend always be 100%? Yes, normally. Reduce to 80–90% only if correction feels too aggressive.

Re-configure for every project? No — calibrate once. Only change when switching headphones.

Best headphones for Aether? Neutral studio cans (Sennheiser, Beyerdynamic) need fewer adjustments than consumer headphones (Beats, Bose).

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