Ensoniq ESQM Digital Wave Synth Synthesizer Module

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$888.00

4.5 (3)

1 Review

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Page last updated Jun 27, 2026

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Description

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The ESQ-M is a rack-mount version released in 1987 which is identical to the ESQ-1 except that it excludes the on-board sequencer option. Although the waveforms are digital in nature, the filters are all analog as on the Mirage. In fact, for a digital synth the ESQ-1 has many good old analog-synth features such as a ring modulator, sequencer, and oscillator-sync. The envelopes and LFOs are can be freely routed to each DCO, VCA and or VCF.

Specifications Polyphony - 8 voices (dynamic voice allocation) Oscillators - 3 digital oscillators per voice, 32 waveforms LFO - 3 LFOs per voice; triangle, saw, square, random Filter - 4-pole analog resonant filter with 6-stage envelope VCA - 4 VCA + 4 Envelopes with 7 parameters per voice Effects - None Keyboard - 61 note (velocity) Memory - 40 patches Control - MIDI (8-parts) Date Produced - 1986 - 1988

Product specs

Brand	Ensoniq
Model	ESQ-M Digital Wave Synthesizer Module
Finish	Black
Year	1986 - 1988
Made In	United States
Categories	Digital Synthesizers, Rackmount Synths
Analog / Digital	Digital
MIDI I/O	MIDI Input, MIDI Output, MIDI Through
Polyphony	8 Voices

FAQs

What type of synthesis is used in the Ensoniq ESQ-M Digital Wave Synthesizer Module?: The Ensoniq ESQ-M utilizes digital wave synthesis, offering a range of digital waveforms that can be shaped and modulated for diverse sound creation.
How many voices of polyphony does the Ensoniq ESQ-M offer?: The Ensoniq ESQ-M provides 8 voices of polyphony, allowing for complex layering and rich sound textures in your compositions.
Can the Ensoniq ESQ-M be integrated with modern MIDI setups?: Yes, the Ensoniq ESQ-M features MIDI Input, Output, and Through, making it compatible with modern MIDI setups for seamless integration into your studio environment.
Is the Ensoniq ESQ-M suitable for live performance use?: As a rackmount synthesizer module, the Ensoniq ESQ-M is ideal for studio use but can also be incorporated into live setups with appropriate MIDI controllers for performance flexibility.
What are the standout features of the Ensoniq ESQ-M's sound capabilities?: The Ensoniq ESQ-M is known for its digital wave synthesis, robust modulation options, and the ability to create a wide range of sounds from lush pads to cutting leads.

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ensoniq ESQM Digital Wave Synth Synthesizer Module.

Comparisons

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The Ensoniq ESQ1 has a rack version, ESQM, which lacks the sequencer but offers a similar sound profile in a smaller format.
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The ESQM offers a unique sound character with its digital waveforms and analog filters, often compared to but distinct from the Korg DW-8000's similar hybrid design.
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The Hydrasynth is structurally and design-wise similar to the ESQ1, but it surpasses the ESQ1 in functionality except for lo-fi sound and sequencer capability.
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The 3rd Wave synth employs a Rossum SSM-type lowpass filter, differing from the ESQ1's filter character, yet offers similar low-resolution grit.
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Features and functionality

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The ESQ1 sequencer is highly praised, and some prefer using it alongside other gear like the EPS16 for sequencing and sampling.
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The ESQM's parameter changes don't take effect until the next note is played, limiting real-time adjustments like filter sweeps without external modulation assignments.
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The ESQM lacks built-in pulse width modulation but can achieve similar effects using oscillator sync tricks.
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The ESQ1 utilizes the CEM3379 filter chips, contributing to its unique sound character.
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Modwave offers low-resolution grit options and filter models, providing an easier programming experience than the ESQ1.
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User experience

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Owners transitioning from larger Ensoniq machines often find the ESQM a viable alternative without sacrificing sound quality.
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Some users find the ESQ1's interface less intuitive compared to models like the JD-800, while others appreciate its straightforward design.
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Value and pricing

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The ESQM rack module is generally more expensive than the keyboard version due to its compact size and collector interest.
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Setup and maintenance

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The ESQM requires battery replacement, typically involving desoldering; some users install a AA battery holder for easier swapping, though opinions on this modification vary.
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Use cases and applications

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The ESQM excels at producing icy, alien, and gritty sounds due to its digital waveforms, but can also create warm tones with its analog low-pass filter.
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Mods and upgrades

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The ESQM responds to aftertouch and polyphonic aftertouch via MIDI, enhancing expressiveness when paired with an appropriate external controller.
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4.5 out of 5

Based on 1 Review and 3 Ratings

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redvoid

204

over 7 years ago

3 DCOs underrated digital / analog hybrid loaded with Curtis chips on the cheap

The M1 and D50 got more heat, but this has a better VCF than both of them, and it's chock ful of Curtis chips: 8x CEM3379 VC Signal Processor Filter/Mix/VCA, 1x CEM3360 Dual VCA, 4x SSM2300

You'll need a MIDI Editor/Librarian application, or a dedicated hardware controller to get the most out of it but with 3 Oscillators, and complex routing, with a pan modulation available on the VCAs one of it;s signature sounds, you can get fuzzy warm pads all day, while still able to produce some buzzsaw bass with a satisfying thwappy attack.