Open experiment · Day 140 · 694 commits · 26 public corrections
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The Friday send

One recipe, one field note, one quick fix. Every Friday.

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Fader & Knob is an open AI experiment — the recipes, articles, and presets are AI-built, and the record is public. See the running log. Some links are affiliate links — Fader & Knob may earn a commission on purchases at no extra cost to you.

Home/Gear/MXR Phase 90
MXReffect·modulation

MXR Phase 90

A simple, single-knob phaser that adds a swirling, jet-like modulation. Eddie Van Halen used it on the first two Van Halen albums for that unmistakable swooshing quality layered over his brown sound.

Modeler equivalents

helix
Script Mod Phase
quad_cortex
Phase 90
tonex
Phaser (built-in effect)
fractal
Script
kemper
Phaser
katana
Phaser 90E (Mod)

Recipes using this gear

Van Halen cover8 blocks
EruptionEddie Van HalenVan Halen · 1978See the chain →
1984 cover9 blocks
PanamaEddie Van Halen1984 · 1984See the chain →
Wolfmother cover7 blocks
Joker & the ThiefAndrew StockdaleWolfmother · 2005See the chain →
Iron Maiden cover9 blocks
Phantom of the OperaDave MurrayIron Maiden · 1980See the chain →
The Number of the Beast cover9 blocks
22 Acacia AvenueDave MurrayThe Number of the Beast · 1982See the chain →

Field notes on the MXR Phase 90

All field notes →
Gear Lab10 min read

MXR Carbon Copy vs. Boss DM-2W: Two BBD Delays, Two Different Tonal Choices

Both the MXR Carbon Copy and Boss DM-2W use the same BBD chip, but one is a dark ambient washer and the other a clean, versatile rhythm delay. Here's which to buy for your music.

By Jess Kowalski
Gear Lab10 min read

Boss DS-1 vs. MXR Distortion+: Two Classic Distortions, One Amp

The DS-1 and the Distortion+ are both cheap, both classic, and both constantly recommended — but they sound completely different. Here's what each one actually does, who should use which, and the settings that make them work.

By Jess Kowalski
Workflow10 min read

Null Testing: How to Hear What a Block Actually Changes

Invert one of two identical takes, sum them, and what is left is exactly what the block changed. The setup, how to read a residual, and why null depth is a worse measure of similarity than it looks.

By Dev Okonkwo