Rawton Forge Rotation [Max for Live]

• Product: Rotation
• Developer: Rawton Forge
• Version: 1.7
• Format: Max for Live Device (.amxd)
• Requirements: Ableton Live 11 or later
• Source: isotonikstudios.com/product/rotation-by-rawton-forge

Rotation is a Max for Live stereo widening device from Rawton Forge that generates two quadrature signals via a Hilbert transformer, phase-shifting them 90 degrees across the spectrum rather than delaying or duplicating the source. Phase, Width, and Angle controls set stereo positioning independently, an LFO can animate all three at once, and rotation frequency can lock to an incoming MIDI note. It runs inside Ableton Live 11 or 12 with Max for Live, on Mac or Windows. It answers searches for a mono-compatible widener built on quadrature phase processing.

Key Takeaway

MIDI-locked rotation activates once a bass or lead line holds a note long enough for rotation frequency to settle, keeping the stereo structure perceptually stable. It displaces static width settings that don’t track pitch. A bassline changing pitch on one rhythm asks the lock to re-tune faster than it settles. Fixed-pitch drones or pads get the most predictable results.

Ninety Degrees Across the Whole Spectrum

Rotation generates two quadrature signals from the input using a Hilbert transformer built from a precision-calibrated all-pass network, phase-shifting them by exactly 90 degrees across the entire spectrum rather than delaying one channel against the other the way a Haas-effect widener would. Every harmonic component in the signal gets this treatment individually, so the resulting width doesn’t rely on comb filtering or channel-timing offsets that collapse when the signal is summed to mono.

Width sets the stereo spread from fully mono through to the maximum ±90-degree quadrature spread, Phase sets the overall rotation angle of the stereo image without changing its width, and Angle pans the whole rotated image left or right without affecting width — three controls addressing three separate geometric properties of the stereo field rather than one combined width knob doing all three jobs at once.

Because the two output signals are mathematically orthogonal, they behave as a complex vector in the stereo plane rather than as two independently delayed channels, which is what lets Phase, Width, and Angle move the stereo image without introducing the mono-collapse most delay-based wideners are prone to.

The rotation processing is applied across the full spectrum as a single stage rather than split by frequency band, so widening only the high end while leaving the low end untouched isn’t available inside Rotation itself. Producers widening full mix elements or wide-band synths and pads get direct use from the single full-spectrum stage; producers needing frequency-selective widening add a crossover or multiband tool around Rotation rather than inside it.

Phase, Width, and Angle Move Together

The built-in LFO can target Phase, Width, and Angle simultaneously, with each parameter set to one of three independent routing states: Off leaves the knob controlling the value directly, Sine Bipolar applies a symmetrical sine sweep above and below the knob position at a depth set by that position, and Full Rotation continuously sweeps the parameter across its full range from −180° to +180° in a cyclic ramp offset by the knob position.

All three parameters share the same LFO cycle rather than running on independent modulation sources, so Phase, Width, and Angle move in a synchronized relationship to each other whenever more than one is routed away from Off — there’s no way to run Width on a slow cycle while Angle modulates on a faster, unrelated one.

At low LFO rates, the stereo image moves slowly and spatially; pushed toward audio-rate speeds, the same modulation turns into rich, growling harmonic texture rather than a simple wide-slow-narrow cycle, particularly when the rate is tuned close to the fundamental frequency of the note being processed.

Producers animating a pad or lead’s stereo image over the course of a phrase get direct use from the LFO’s slow end; sound designers pushing the rate into audio range get textural, near-synthesis behavior from the same shared cycle. Producers needing Phase and Width to drift at genuinely independent speeds have to automate one of them manually.

A Lock That Needs a Held Note

Rotation’s MIDI input locks the rotation frequency to the pitch of an incoming note — when tuned precisely, the rotation speed matches the note’s fundamental frequency and the stereo structure reads as perceptually stable, as though the rotation had stopped, while the underlying phase transformation keeps running beneath that stable-sounding surface.

Ratio sets the frequency relationship between the incoming MIDI note and the internal rotation frequency, defining the harmonic alignment point; Rate then acts as an offset from that tuned frequency, so any adjustment to Rate causes the previously stabilized structure to start rotating again at the newly selected speed, producing expressive detuning and dynamic spatial movement on demand.

A held note gives the lock time to settle to a stable rotation frequency; a bassline that keeps the same rhythmic pattern while shifting pitch note to note asks the lock to re-tune every time the pitch moves, producing audibly less stable tracking than a sustained note gets.

Sustained notes, pads, and held bass tones get the most stable, predictable result from MIDI lock; fast-moving bass or lead lines with pitch changes on a steady rhythm get less consistent tracking than the same part played on one held pitch.

Silence Between Hits Starts a New Cycle

The Envelope section modulates Rate over time in response to the incoming audio signal rather than running on a fixed clock — an internal audio envelope detector triggers the envelope, moving Rate from its current value toward a set Target Rate, then releasing back toward the original Rate on a separate decay stage.

Rise sets the attack time to reach Target Rate, Hold sets how long Rate stays at that target before release begins, Length sets the total decay time back to the original Rate, and Curve shapes that decay from linear to exponential — four stages controlling one modulation event per audio trigger rather than a looping or cyclic envelope.

The envelope can only re-trigger after a brief silence following the previous trigger, so a rapid string of audio events with no gap between them doesn’t produce a rapid string of separate envelope cycles — the detector needs that silence to register the next trigger as a new event rather than a continuation of the current one.

Percussive or rhythmically separated sources with clear silence between hits get one clean envelope cycle per hit; a dense, continuously sustained source with no gaps between events gets one long envelope cycle instead of a series of retriggered ones.

Shape, Not a Number, on the Meter

Feedback routes part of the rotated signal back into the processor, adding motion and resonance rather than leaving the quadrature signal as a single-pass transformation; higher Feedback values push the behavior toward phasor-like resonance, introducing harmonic complexity that isn’t present in the signal at zero Feedback.

The Stereo Meter displays the incoming signal’s Mid and Side components in real time as a geometric shape rather than a single numeric correlation value — a vertical line reads as pure mono, a diagonal line reads as hard left or right, a horizontal line reads as pure side content, and a full circle reads as a sine wave paired with its 90-degree quadrature signal.

Reading the Feedback and Stereo Meter together requires interpreting shape rather than a number — there’s no isolated numeric phase-correlation reading displayed alongside the geometry, so confirming an exact correlation value for a written mix report means estimating from the displayed shape rather than reading a figure directly.

Sound designers building resonant, evolving stereo motion get direct use from pushing Feedback while watching the Meter’s shape shift in response; engineers needing a precise, loggable correlation number for a deliverable get a visual read rather than an exportable value from the Meter itself.

When the Bassline Won’t Sit Still

Locking rotation frequency to a held note works because the note doesn’t move; a bassline sliding between pitches on the same rhythm asks the lock to re-tune faster than Ratio and Rate can settle to it cleanly.

FAQs