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Expert Sleepers ES-3 mk4 - Lightpipe / CV Interface


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Product Description

The ES-3 is a Eurorack format module which converts eight channels of ADAT Lightpipe input to DC coupled outputs on 3.5mm jacks, for the ultimate convenience in connection of a DAW directly to analogue synthesizers.
The outputs can be used as control voltages (CVs), for example with software such as Expert Sleepers Silent Way, and can also be used as audio outputs at high, modular synth-compatible levels.

With the ES-3, a single optical cable is all that is need to bring direct CV control from your DAW right into the heart of a modular system.

The ES-3 mk3 was awarded an Editor's Choice 2014 award by Electronic Musician Magazine (Jan 2014 issue).
“Whether you use Max/MSP, NI Reaktor, or the company’s own Silent Way plug-in, the ES-3 Mk3 is an essential tool for any serious modular-synth user.”

“Silent Way is a no-brainer”
“Incredible options for controlling modular synths”
“... one of the most friendly plug-and-play pieces of hardware you'll ever have the pleasure to use.”


The ES-3's specifications are as follows:

  • Panel width: 8HP
  • Module depth: 50mm
  • Input connection: optical, ADAT Lightpipe standard
  • D/A conversion: 24 bit, 113dB SNR typical
  • Output connections: 8x 3.5mm jacks, DC-coupled
  • Maximum output voltage: approximately ±10V DC
  • Indicators: LED for ADAT clock sync; illuminated sockets indicate output voltage (+ve/-ve)
  • Current draw: 148mA on the +12V rail, 18mA on the -12V rail

The front panel is drilled for both Doepfer and Analogue Systems mounting holes (using a 'slot' rather than a single round hole). The power connector is a Doepfer standard 16 way IDC, with -12V furthest from the top of the board.

ES-3 mk4

February 2017 sees the launch of the "ES-3 mk4". Functionally equivalent to the ES-3 mk3, the mk4 adds these improvements:

  • Illuminated jack sockets
  • Less deep

96kHz compatibility
The ES-3 produces 8 outputs as normal when the ADAT interface is operated at 44.1/48kHz. In double speed mode (88.2/96kHz), the ES-3 outputs 4 channels, duplicated across pairs of outputs (ES-3 outputs 1/2 carry ADAT channel 1, outputs 3/4 carry ADAT channel 2 etc.).
However, users of Silent Way can take advantage of the Silent Way SMUX plug-in to interleave CVs on the 96kHz stream, restoring the number of usable CV outputs to 8.

Other Details


Product Reviews

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  1. 8 Beautiful Outputs! 5 Star Review

    Posted by on Jul 17th 2017

    I have a silver UAD Apollo with an extra set of ADAT connections that weren't doing anything. I picked up a Mother 32 and wanted to integrate Reaktor Blocks with it (LFOS, ADSRs, etc). The ES-3 solved that problem allowing me to send CV via the ADAT out thru the ES-3 and into the Mother 32. It's a beautiful piece of hardware.

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