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Average Price: $104

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$149

$350+

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Based on price data from 1 merchant for "Expert Sleepers ES-40 SPDIF Interface". Prices shown reflect NEW condition. Tracking began Apr 25, 2026.

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Description

Designed for the modern modular enthusiast, the Expert Sleepers ES-40 SPDIF Interface is an essential tool for any Eurorack setup. This S/PDIF converter module seamlessly bridges the gap between your modular synthesizer and digital audio equipment, offering coaxial input and output for streamlined connectivity. The ES-40 doesn’t just stop at basic conversion; it integrates perfectly with up to five modules from the ESX series, utilizing the I2S format to ensure efficient communication and control.

Whether you're working on complex soundscapes or intricate beats, the ES-40 is engineered to handle sample rates up to 192 kHz, allowing for high-fidelity audio processing. Stay in the groove with confidence, knowing that the LED indicator provides a clear visual for S/PDIF sync lock, ensuring your signals are always in sync.

This module is as power-conscious as it is powerful. With a power consumption starting at 26 mA on +12 V, it scales with your sample rate needs, maintaining efficiency without sacrificing performance. Ideal for both studio and live environments, the Expert Sleepers ES-40 is your gateway to a world of sonic possibilities.

Key Features:

  • S/PDIF converter module with coaxial input and output
  • Connects up to 5 modules from the ESX series (I2S format)
  • Supports sample rates up to 192 kHz
  • LED for S/PDIF sync lock
  • Power consumption: 26 mA on +12 V (increases with sample rate)

Product specs

Available since July 2018
Width 6 TE / HP

FAQs

What is the primary function of the Expert Sleepers ES-40 SPDIF Interface in a modular synth setup?

The Expert Sleepers ES-40 serves as a digital-to-analog converter, allowing you to interface SPDIF digital audio signals with your modular synthesizer, expanding your setup's connectivity and control options.

How does the Expert Sleepers ES-40 integrate with other Expert Sleepers modules?

The ES-40 is designed to work seamlessly with other Expert Sleepers modules, such as the ESX-8CV and ESX-8GT, to provide additional CV and gate outputs, enhancing your modular system's capabilities.

What are the size specifications of the Expert Sleepers ES-40 for modular rack mounting?

The Expert Sleepers ES-40 has a width of 6 HP, making it compact and easy to fit into most Eurorack modular synthesizer setups.

Is the Expert Sleepers ES-40 compatible with all SPDIF audio sources?

Yes, the ES-40 is compatible with standard SPDIF audio sources, allowing for versatile integration with various digital audio equipment in your studio or live rig.

Expert Sleepers

Expert Sleepers

Introduction to the Expert Sleepers ES-40

Video thumbnail for Introduction to the Expert Sleepers ES-40 by Expert Sleepers

Introduction to the Expert Sleepers ES-40

Expert Sleepers

Expert Sleepers

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Expert Sleepers ES-40 SPDIF Interface.

Software and compatibility

  • The ES-8 can function as a standalone ADAT-to-audio converter, expanding I/O for ADAT-equipped interfaces, but requires ADAT out to send CV from the computer.

    Source
  • Logic and Ableton handle interface changes well when devices are set up separately and as aggregates, but switching to Windows may require different interface solutions.

    Source
  • VCV Rack can work with the ES-8 using the Core Audio module, though VPO signal scaling might need testing for optimal integration.

    Source

Features and functionality

  • The ES-9's optical ports are SPDIF, unlike the ADAT ports on the ES-3, ES-6, and ES-8, limiting its expandability with ADAT interfaces.

    Source
  • The ES-8 can chain together with optical cables for increased inputs, enhancing modular setups without requiring additional interfaces.

    Source

Use cases and applications

  • Sending an audio pulse from the DAW to the modular can serve as a reliable clock, providing more stable timing than MIDI clocks.

    Source
  • Audulus users can utilize the ES-8 via USB on an iPad for complex modulation, liberating their modular setups for unique analog and digital module use.

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  • The ES-8 can serve as a multi-track recording interface, effectively capturing CV, though pitch CV requires Silent Way plugins for calibration.

    Source

Comparisons

  • The ES-3/ES-6 combo is noted as the best DAW-based integration for Eurorack, suggesting a preference for interfaces with full ADAT support for seamless connectivity.

    Source

User experience

  • Aggregate devices are often seen as cumbersome, especially if one interface is powered off, prompting users to consider fewer interfaces for smoother operation.

    Source
  • Users mention the ES-8 requires it to be the primary audio interface, complicating simultaneous monitoring and mic input recording in a DAW setup.

    Source

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Artist usage

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Andy Hunter°

Music Producer

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Andy Hunter° uses the Expert Sleepers ES-40 SPDIF Interface to route CV and Gate directly from Logic, as shown in his Facebook post.

Genre Usage

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