Ableton Shoegazer Reverse Gate v.5.02 SPX90 Style Max for Live Device (.amxd file)

SPX Reverse Gate, Reconstructed

Recreate the Magic of the Legendary Yamaha SPX-90

A precise reconstruction of Preset 17 “Reverse Gate” from the Yamaha SPX90, rebuilt at the structural level for Max for Live.

This is not a stylistic imitation. The original tap structure, early reflection behavior, and input stage saturation have been analyzed and reimplemented to preserve the characteristic SPX response while extending control for modern production.

The Reverse Gate, Precisely Modeled

Not just a reverse reverb approximation.

• Original tap timing relationships derived from hardware
• Nonlinear gain distribution across early reflections
• Liveness-controlled curvature from exponential to linear
• Coupled interaction between predelay and room scaling

The result is the defining SPX envelope, a suction-like onset followed by a controlled expansion.

Input Stage Reconstruction

The SPX sound is not only about space, but about how signal hits the system.

The inputGain parameter models the analog input stage behavior:

• dB to linear gain staging
• Soft saturation based on NE5532 characteristics
• Linear response at low levels, gradual peak rounding above 0 dB
• Saturation applied pre-ADC, consistent with original signal flow

This stage is critical for achieving the density and texture associated with SPX units.

Parameter Architecture

Familiar in concept, extended in resolution.

• room
Scales the entire temporal structure, not just decay length

• liveness
Controls the curvature of reflection distribution, from exponential clustering to linear spread

• firstlevel
Sets the minimum gain floor for initial reflections, defining perceived distance

• predelay
Determines the pre-onset “pull” before the reverse swell

• tap
Controls reflection density, from discrete grains to continuous walls

• width
Adjusts stereo energy distribution

• feedback
Extends the structure into recursive spatial behavior, beyond static reverb tails

Beyond Guitar Applications

While historically tied to guitar processing, the architecture lends itself to broader use:

• Reshaping drum transients with reverse envelopes
• Time-stretch-like expansion of pads
• Forward-floating vocal placement
• Spatial articulation in bass music and experimental electronic forms

On synthesizers, it operates less as an effect and more as a temporal transformation tool.

For Those Who Know SPX

Designed for users who are specifically looking for that SPX Reverse Gate behavior:

• The exact envelope shape
• Control over early reflection structure
• Input-stage-driven texture shaping

This is a structural reconstruction, not a nostalgic approximation.

Available for Ableton Live

A reimplementation that treats Reverse Gate not as a preset, but as an instrument.

Built for contemporary workflows while retaining the internal logic that made the original distinctive.

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ver.5.0 ... Totally updated. (2026/4/26)
ver.4.2 ... Missing file bug fixed. (12/5/2024)
ver.4.1 ... UI Updated. (11/30/2024)

ver.2.1 ... initialize bug fixed.
ver.2.2 ... New Compact UI Updated.
ver.2.3 ... initialize bug fixed.
ver.2.4 ... UI and degrading updated.
ver.3.0 ... UI and more like YAMAHA sound.
ver.3.5 ... UI updated.
ver.4.0 ... Live 12, Apple silicon support.

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Delay

2290 Delay https://akihikomatsumoto.sellfy.store/p/ableton-2290-delay/

REcho https://akihikomatsumoto.sellfy.store/p/abletonrecho

Analog Delay https://akihikomatsumoto.sellfy.store/p/abletonanalogdelay/

Bouncing Delay https://akihikomatsumoto.sellfy.store/p/abletonbouncingdelay

Shoegazer Reverse Gate https://akihikomatsumoto.sellfy.store/p/abletonshoegazerreversegate/

VDB Delay https://akihikomatsumoto.sellfy.store/p/abletonvdbdelay

Reverse Delay https://akihikomatsumoto.sellfy.store/p/abletonreversedelay/

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

Tap Delay https://akihikomatsumoto.sellfy.store/p/abletontapdelay/

Color Delay https://akihikomatsumoto.sellfy.store/p/abletoncolordelay/

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Akihiko Matsumoto

Study Site https://akihikomatsumoto.com/study/

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