Ableton 90 Phaser v.1.1 Max for Live Device (.amxd file)

The Anatomy of a Classic Phase Shifter in the Modern Studio

The ubiquitous orange phase pedal introduced in the 1970s remains an immovable pillar in audio engineering and sound design. While it is universally recognized for shaping the definitive electric guitar tones of psychedelic rock and modern hard rock, its architectural footprint extends deeply into the realm of electric pianos. The complex harmonic movement it imparts on a Rhodes or Wurlitzer keyboard is a direct result of its internal analog ecosystem. Understanding this effect requires looking past the single speed knob and examining the electrical behavior occurring beneath the chassis.

The Physics of Phase and Modulation 

At its core, this circuit relies on a cascade of four allpass filter stages. The modulation is driven by a precise low frequency oscillator based on a Schmitt trigger and integrator design. Unlike standard digital phasers that utilize mathematically perfect sine or triangle waves, the original analog hardware generates a distinct asymmetrical waveform. The rise time of the control voltage is noticeably faster than the fall time, creating an uneven cyclical pulse that human ears instinctively recognize as authentic.

Furthermore, the organic character of the vintage units stems from the natural variance in their field effect transistor components. In earlier iterations of the circuit, mismatched transistors caused the phase notches to spread out across the frequency spectrum, resulting in a broad and warm spatial effect. Later production models utilized tightly matched components, which mathematically collapsed those scattered notches into a singular and highly sharp resonant sweep.

Saturation and Asymmetrical Clipping 

A critical component of this sonic signature is nonlinear distortion. Early revisions of the circuit employed specific operational amplifiers that hit their voltage rails asymmetrically. When the internal signal exceeds these electrical thresholds, the circuit generates pronounced even harmonic distortion. This physical limitation is precisely what imparts the famous analog warmth to the audio signal. Pushing the input signal harder does not simply increase the output volume. It fundamentally alters the harmonic structure and compresses the internal modulation.

Introducing 90 Phaser for Max for Live 

The 90 Phaser is an Ableton Max for Live device built entirely upon these exact electrical principles. It operates as a strict physical model, calculating the mathematical realities of the component interactions in real time rather than merely approximating the final audio output. It bridges the gap between historical hardware limitations and modern digital control.

Core Technical Capabilities

• Circuit Topology Selection: The system calculates the mathematical behaviors of four distinct historical circuit revisions.
• Variable Resonance: Users can select the broad and uncoupled sweep of the vintage era or the aggressive resonance introduced later by the addition of a physical feedback resistor.
• Authentic Saturation Staging: By utilizing the input gain control, producers can drive the internal virtual amplifiers into asymmetrical clipping.
• Extreme Audio Processing: Pushing the input gain heavily transforms the device from a clean spatial modulator into a harmonically rich distortion tool.
• Nonlinear Control Response: The speed parameter accurately reflects the hyperbolic curve of the original hardware potentiometer.
• Realistic Acceleration: The modulation rate changes gradually in the lower ranges and accelerates rapidly near the maximum setting, mirroring the exact physical interaction of the original hardware.

By focusing purely on the physics of the original circuits, the 90 Phaser provides an objectively accurate tool for integrating classical electric guitar and keyboard signal chains into a contemporary digital audio workstation.

Existing users of the 90 Phaser can easily access the latest build. By logging into Sellfy with your purchasing account, the system will automatically provide the most recent version free of charge.

v.1.1 ... Improved overall circuit modeling fidelity. (2026/5/26)

Modulation FX

Leslie https://akihikomatsumoto.sellfy.store/p/ableton-leslie/

Mod Delay https://akihikomatsumoto.sellfy.store/p/ableton-mod-delay/

Amp Modulator https://akihikomatsumoto.sellfy.store/p/abletonampmodulator/

Gate Slicer https://akihikomatsumoto.sellfy.store/p/abletongateslicer/

Freq Modulator https://akihikomatsumoto.sellfy.store/p/abletonfreqmodulator/

90 Phaser https://akihikomatsumoto.sellfy.store/p/ableton-90-phaser/

CE1CE2 Chorus https://akihikomatsumoto.sellfy.store/p/ableton-ce1-ce2-chorus/

Akihiko Matsumoto

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