Dr Phase

Name: Dr Phase
Author: Audiority

by Audiority · Modulation · Phase 90 phaser pedal model

Not rated yet

Dr Phase is a free analog simulation of the MXR Phase 90 phaser pedal from the early 70s.

It adds a vintage mode, a 2-stage mode, speed sync and a noise gate, and is free.

Best for: Guitars, Bass, Keys & Synths, Sound Design, Drums. Genres: Rock & Indie, Electronic & EDM.

Keywords: phaser, vintage, free, electric guitar, 70s, drums, simple, bass, classic, synths, analog-sounding, hardware emulation, keys, single knob, beginner-friendly, metering, minimal controls, mixing, oversampling, piano, resizable UI, samples & loops, sound design.

What it does

Dr Phase is Audiority's free analog-modeled phaser, based on the MXR Phase 90 pedal from the early 1970s. Like the pedal it centres on one speed knob, with a few studio extras added around it.

Phaser: analog-modeled phasing driven by a single Speed control, as on the original pedal.
Vintage mode: a switch for the vintage version of the effect.
2-stage mode: a P45 option with two phasing stages instead of the full circuit.
Sync: the speed can lock to the host tempo.
Gain and mix: pre and post gain, plus a mix control to blend in the dry signal.
Noise gate: a built-in gate to keep hiss and hum down, useful on guitar.
Interface: level meters, a resizable window and an HQ (oversampling) button; all controls can be automated.

The current version is 1.3 (December 2025, a maintenance rollup). It is free.

Source: Audiority product page

When to use it

Dr Phase is the pick when you want the classic Phase 90 swirl with almost no setup, at no cost. Compared with PhaseMistress it is far simpler: there is no choice of stage count beyond the 2-stage switch, and no resonance, LFO shape or envelope control, but one knob gets you a familiar pedal sweep. Unlike MicroShift, which thickens and widens with subtle pitch-shifted delays, Dr Phase gives an obvious moving phase sweep. It also does far less than ShaperBox 3 or Portal, which suits anyone who just wants a phaser pedal in the DAW.

Best for: classic phasing on guitars, bass, electric pianos, synth leads and drum loops.
Genres: rock, funk, psychedelic and electronic music.
Look elsewhere if: you want control over stages, resonance and modulation shape; PhaseMistress does much more.
Tip: don't keep it for guitar only; both Audiority and Bedroom Producers Blog suggest drums, synth leads and even brass.

What producers say

There are no in-depth reviews, but Bedroom Producers Blog's write-up is positive about its simple, pedal-like design.

Bedroom Producers Blog praised how closely it follows the pedal's speed-knob simplicity, the vintage mode and HQ button, and its use beyond guitar; for guitarists it "saves you the hassle of recording an amp".
Criticism: the same write-up noted that the warmth of the real MXR pedal is hard to capture digitally.

Bedroom Producers Blog article

Where to buy

Audiority: Free

Tutorials and reviews

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