ER-301: Sound Computer
for Eurorack Modular Synthesizers

The ER-301 is a voltage-controllable canvas for digital signal processing algorithms.  One of the many characteristics that attracted me to modular synthesizers is that they enabled me to make the kind of music that I love away from the computer.  However, not all digital audio tools can be elegantly and efficiently realized in a dedicated hardware form.  So, I either had to deny myself those tools, or, go to the computer. The ER-301 is the culmination of 2 years of sweat and tears spent creating a third option.

3 panel flavors are available.

Width: 30hp 
Depth: 3cm from the back of the face-plate 
Power: refer to the wiki page on ER-301 Power.
Latest Firmware Version: refer to the firmware page.

** Some details might change without notice.

Official Manual
COMING SOON: Software needs to stabilize some more before committing words to the page.  In the meantime, there is a wiki that is growing and a forum dedicated to the ER-301 which I actively monitor.

Orders are expected to reopen in May 2018.  As a tiny business with tiny orders, I am at the mercy of my suppliers who prioritize larger orders. Questions?
Sign-up here to receive a notification when ER-301 orders reopen:

The ER-301 hardware is mature (revision 7) and robust, but there are a few things that you should note before purchasing:
  • There is no manual (yet).  Why?  See next point.  However there is a very active forum where you can get help and ask questions, as well as a wiki which is slowly growing with new content.
  • The software is still under heavy development which means frequent updates and bugs.  The good news is that typically any bugs found are fixed within a few days.