$19.99+

The Reese bass is a foundational acoustic structure in electronic music. Tracing its lineage back to the hardware samplers and synthesizers of early 1990s Drum and Bass and Jungle, the sound is defined by a specific psychoacoustic phenomenon. By heavily detuning two or more oscillators, continuous phase cancellation and reinforcement occur. This creates a tearing, beating movement that provides dense mid-range energy.
However, from an engineering perspective, this traditional architecture is inherently flawed.
While phase cancellation creates desirable movement in the upper harmonics, it simultaneously destabilizes the low-end spectrum. When two detuned low frequencies drift out of phase, the fundamental sub-bass energy periodically disappears. Furthermore, when non-linear processing such as analog drive or wavefolding is applied to a detuned signal, intermodulation distortion creates unwanted low-frequency artifacts that muddy the mix and compromise headroom.

Addressing this requires moving beyond standard subtractive synthesis and traditional high-pass filtering. Standard filters introduce phase shifts that smear transients and disrupt the precise timing of low-frequency impacts. The mathematically optimal solution lies in phase distortion and analytic harmonic separation.
By utilizing phase distortion, the exact spectral content of the waveform can be manipulated by warping the phase accumulator. To solve the low-end collision problem, the fundamental frequency must be surgically removed only after all non-linear processing has occurred.
This is achieved by computing the analytic Fourier coefficients of the fundamental frequency. A mathematically pure reference signal is generated based on these calculations. This reference signal is then subjected to the exact same non-linear drive and folding circuits as the main waveform. By subtracting this identically processed reference from the main output, the fundamental frequency is canceled perfectly.
The result is a complex, aggressively detuned, and wavefolded harmonic layer that contains absolutely zero sub-frequency information.

Reconstructing the Perfect Sub-Bass
With the fundamental mathematically eliminated from the detuned signal, a pristine, un-detuned pure sine wave can be injected directly into the center of the stereo field. This completely separates the harmonic beating from the sub-bass foundation. The low-end remains monolithic, phase-aligned, and constant, while the mid-range retains the wide, tearing characteristics of classic 1990s hardware circuits.

This specific digital signal processing architecture is the operational core of Reese 90. Built for the Ableton Max for Live environment, it internally processes the complex mathematics of phase distortion, analytic fundamental cancellation, and stereophonic wavefolding. It bypasses the physical limitations of legacy hardware while maintaining its exact sonic characteristics.

Features That Define the Future of Bass Synthesis

Reese 90 operates as a precision tool for low-frequency design, ensuring phase coherence and structural integrity without sacrificing harmonic aggression.
Please note that for existing users, the latest version of this device is available automatically and free of charge. Simply log into your Sellfy account with your purchasing credentials to access the updated architecture.
v.4.0.2 ... Replaced minimoog-style VCA with an Akai-style VCA. (2026/5/11)
v.4.0 ... Added sub split mode & minimoog style VCA. (2026/5/10)
v.3.0 ... Added AKAI S950 Style Filter & Legato Mode. (2026/5/4)
v.2.5 ... Expanded ADSR Length. (6/26/2025)
v.2.3 ... Fixed missing sound bug. (4/4/2025)
v.2.1 ... Fixed note off bug, added fine tune. (1/27/2025)
v.2.0 ... Added overtone for wobble reese bass & stereo width. (1/14/2025)
v.1.5 ... mono / stereo click noise fixed, level bug fixed, detune algorithm updated. (12/31/2024)
v.1.2 ... Two additional oscillators in stereo mode.(12/25/2024)
v.1.1 ... Adjusted the mono level. (12/17/2024)
v.1.0 ... Launch. (12/16/2024)
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Akihiko Matsumoto
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