ER-301: Sound Computer

Description

Note from me:This thing can do so much! I'm selling it because I haven't been using it as much as I have begun to focus more away from Eurorack/modular and into stringed instruments. This is definitely one of my favorite modules I have ever owned. Please make a new home for it!Here are some ways I used this amazing do-anything module:- Audio mixer, supporting up to 12 mono channels, including the ability to have sends/returns- Granular sampler- Vocal/Guitar processor- Sound generator with four channels of mono or poly synth generators- Sampler and fx machine- A combination of all of the above at the same time!This will ship in its original wooden box with laser-etched logo as originally received from the manufacturer.From The Manufacturer: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.HighlightsLive virtual patch creation without stopping the audio.A core library of patchable units covering various functions from the simple (mixing, VCA, envelope generation, limiting, filtering, etc.) to the complex (loopers, granular synthesis, variable-rate sample playback, wavetable oscillator, etc.)512MB of RAM, with about 480MB available for memory-resident samples. All memory-resident samples are converted to 32-bit (float) but keep their original sample rate.Loads samples of any sample rate and bit depth (as long as they are WAV files).Records up to 12 tracks of audio/CV to the SD card in the background.Package Manager for easy sharing of patches, presets, custom units, and third party libraries.There is a growing collection of user-developed units.The firmware and SDK are open-sourced on GitHub. Users can develop their own units using the mid-level (Lua) SDK for maximum patching flexibility, or, using the low-level (C++) SDK for additional performance and custom graphics.SpecificationsWidth: 30hpDepth: 35mm from the back of the faceplate including the ribbon cableCurrent Consumption: (+12V/-12V/+5V) 250mA/30mA/0mA2 monochrome OLED displays where the smaller display shows additional context for the focused element in the main display.The main knob is a high-quality optical encoder rated to over 1 million rotations.4x audio (AC-coupled) outputs configurable to 48kHz or 96kHz at 24-bit.4x audio (DC-coupled) inputs sampled up to 60kHz at 16-bit depth.12x CV (DC-coupled) inputs sampled up to 60kHz at 16-bit depth.4x gate (DC-coupled) inputs sampled up to 96kHz at 12-bit depth. Read this before you purchase Firmware 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.The documentation is always lagging behind the firmware development. The forum is usually the best place to get answers these days.All 4 outputs are AC-coupled, therefore, no CV output. (Gasp! The horror!) This is a purposeful design decision to focus the ER-301 on sound generation. If you think even 10-minutes about what a modulation computer would look like, I think you would agree that it is not the ER-301. 

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