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.




PLEASE TAKE NOTE!
The ER-301 hardware is mature (revision 10) 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.
Specifications
Width: 30hp 
Depth: 30mm from the back of the faceplate including the ribbon cable
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.
WARNING:  This video shows a very early version of the ER-301 firmware.  A lot has changed since this video was taken...(^_^)y

00:00 Intro
01:31 A toy example...
02:20 - channel setup
03:18 - assign external audio inputs
03:38 - inserting a unit
04:03 - modulating parameters
06:15 - saving/loading chain presets
07:00 A more realistic example...
07:29 - sample player unit
07:40 - loading sample into sample pool
08:46 - sample slicing view
09:36 - external triggering of sample
10:06 - external slice selection
11:13 - variable delay unit
12:32 - mixer unit (layering sounds inside a chain)
13:38 - loading unit presets
16:09 - creating synthetic percussion (white noise+EQ+VCA+ADSR)
18:20 Recording samples
18:40 - recording directly to a file
19:50 - recording to sample buffer and looping (sample recorder aka looper)
20:49 - creating sample buffer for the sample recorder
21:51 - synced recording and playback of a loop
23:09 - save sample buffer to file
23:30 - saving the tracks recorded with file recorder