If in doubt, ask.

User Manual

The user manual for the ES-9 is available in pdf form. Please choose the manual corresponding to your firmware version below.

Firmware Updates

The firmware update process is described in the user manual. You will need this update tool:

ExpertSleepersDFU_2.3.zip ExpertSleepersDFU_win.zip
Please watch this forum thread for firmware update notifications.
VersionRelease dateCommentsFirmware downloadUser manualConfig tool
(click icon to download)
1.3.1 16/3/2023
  • Fixed an issue where the ES-9's MIDI breakout output might randomly drop messages.
Download User manual
1.3.0 14/12/2022
  • Configurations can now be saved and loaded from the configuration tool.
  • Holding in the headphone volume knob now causes the module to toggle between hosted and standalone configurations.
  • Added a new 'Invert phase' filter option.
Download User manual
1.2.3 5/1/2022
  • Fixed an issue where mixes with smoothing enabled could not achieve -∞dB (i.e. mute).
Download User manual
1.2.2 7/10/2021
  • Fixed a technical issue with the ES-9's USB descriptors.
Download User manual
1.2.1 15/6/2021
  • The S/PDIF input now copes with devices that incorrectly report their sample rate in the S/PDIF stream.
Download User manual
1.2 7/6/2021
  • Added the option of replacing the S/PDIF section with a second mixer.
  • Added the concept of stereo links (and so stereo mixers, stereo mixer inputs, and mix panning).
  • Added optional mix smoothing.
  • Added the ability to control the mixer(s) with MIDI CCs.
  • Added mix input EQ.
  • Added the ability to apply DC offsets to the 3.5mm outputs.
  • Added the option of using the MIDI output as a MIDI thru in standalone mode.
Download User manual
1.1.1 17/3/2020
  • Added separate 'hosted' and 'standalone' configurations.
Download User manual
1.0.1 16/9/2019
  • First release.
Download User manual
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