ERIS CORE
ERISCore

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What is Eris Core?

Eris core is:

  • an artificial intelligence and machine learning (AI/ML) capable system specializing in audio signal processing.
  • An electronic sub-assembly module designed to stand alone but architected for reuse;
  • an integrated rapid application development & test framework
  • a standardized 565 encoded graphics and audio asset library including:
    • 60+ video backgrounds, 100+ oversized backgrounds which can be repositioned
    • 100+ sprite based fonts (8pt-39pt) with digraph sorted kerning files
    • 95K+ sprites: icons, radial gauges, virtual led indicators, game genre theme sprites and animations, etc.
    • 4000+ single cycle waveforms, 30MB spectrally sorted single cycle wavetable database w/index file
  • supported by a cross-platform serial to web socket interface (python) & editor software (html/websocket based)
  • a low-cost high performance design for intended for use by anyone from beginners to advanced developers


**youtube video demo - pre-alpha sys stress, integration & regression testing:**

youtube video

3rd party

License

Software:

  • Wren - MIT License
  • LZ4 - BSD 2-Clause License
  • AIeFS - GNU Affero General Public License
  • Arduino/Teensyduino - MIT License

Audio: https://github.com/KristofferKarlAxelEkstrand/AKWF-FREE - http://creativecommons.org/publicdomain/zero/1.0/

Graphics: selected by availability for commercial reuse. see asset folders for license details.

External dependencies

densaugeo/base64@^1.2.0
fraunhofer-ims/AIfES for Arduino@^2.1.1

3D print, STL & housing graphics

  • Creative Commons Attribution 4.0 International Public License


ErisCore software

  • web based serial interface - MIT License
  • other components - Due to 3rd party mixed license, individual sw component PENDING compliance review before formal license identification.
  • Software Documentation (WIP): https://bmonkaba.github.io/ERISCore/html/

Development State

  • System is currently pre-alpha.
  • Software is currently pre-alpha. Interfaces may change.
  • Hardware design is currently beta 2
  • SLA Mechanical design is currently beta 2.

WIP / Known issues

  • Minor optimizations of the shell internal thin wall supports to improve SLA 3D printing accuracy
  • Multi-format Serial Data (SDIO) access port / connector interface for external connectivity of sensors or HMI expansion

Hardware Features:

  • 192khz@32bit stereo I/O* (hardware capable)
  • Low noise linear power supply section with a balanced thermal design
  • TFT screen with touch interface
  • Analog/Digital (ADIO) connector for interfacing external analog inputs, digital i/o & encoder inputs
  • 8 pin Multi-format Serial Data (SDIO) connector for interfacing external I2C & SPI devices
  • The audio front end supports single-ended input levels from small-mV microphone inputs to 2.1-VRMS line inputs
  • The front-end mixer (MIX), multiplexer (MUX), and programable gain amplifier (PGA) also supports differential (Diff), pseudo-differential, and single-ended (SE) inputs

Software Features:

  • Custom crossover single threaded cooperative multitasking system
  • Cooperative scheduler with granular realtime priority control
  • Integrated Wren compiler & virtual machine (VM) - 32K for the extended PSRAM variant or 16K RAM for the base variant
    • Sandboxed 1.4MB RAM filesystem with indirect access methods for utilizing system assets.
    • TODO volume save/load to SD card
  • VM extension allows scripts to 'request' a VM reboot to pass control to another script.
  • Rapid application development framework includes dynamically editable gui controls
  • Dynamic CPU clock scaling automatically maintains maximum performance while remaining within thermal limits
  • Universal 'human readable' string based messaging
  • Shared Data Dictionary - int32_t / float32_t hash based lookup key value store with key buffer storage (again 'human readable')
  • Extends the standard Teensy 4.1 Audio library to allow full dynamic control of audio connections
  • Audio block parameter controller exposes most public methods to the universal messaging system without using run time reflectors
  • Sliding window 32 bit FFT Audio Block with sub-sampling control
  • Oscilloscope w/ auto-scale and x-y plot C++ application example
  • 2xFFT CQT Polyphonic C++ application example
  • 30+ VM application examples
  • Transparent LZ4 compression/decompression transport layer between the device and the web socket interface (wsi) can improve both latency and and bandwidth
  • Configurable animated or static wallpaper automatically rendered at the start of each frame by the system.
  • Single frame buffer. Secondary buffers implemented as surfaces.
  • Multiple source/destination image block transfer (blt) interfaces:
    • SD card to frame buffer
    • SD card to surface
    • Surface to surface
    • Surface to frame buffer
  • Web based development tool provides:
    • Serial command interface
    • Data dictionary monitor
    • Audio stream flow monitor/editor
    • Ram dump
    • Application jitter monitor
    • FFT & CQT visualization
    • Scripting editor & dedicated VM serial terminal
    • And more...

Hardware Specs:

Microcontroller:

  • NXP IMXRT1060
  • ARM Cortex-M7 600 MHz w/overclock to 720 Mhz (within design enclosure)
  • Float point math unit, 64 & 32 bits
  • 7936K Flash, 1024K RAM (512K tightly coupled), 4K EEPROM (emulated)
  • 16MB PSRAM
  • 32 general purpose DMA channels
  • Cryptographic Acceleration & Random Number Generator
  • Programmable FlexIO
  • Pixel Processing Pipeline

Mass Storage:

  • 32GB SD Card

Power:

  • 9v DC center negative power jack
  • Low noise thermally balanced serial power supply design.

Analog to Digital Converter:

  • TI PCM1864
  • Resolution (Max)(Bits) 32
  • Control interface I2C
  • Sampling rate (Max) (kHz) 192
  • ADC SNR (Typ) (dB) 103
  • Power Dissipation < 145mW

Digital to Audio Converter:

  • TI PCM5100A
  • Architecture Delta Sigma with line driver
  • Number of DAC channels (#) 2
  • Analog outputs 2
  • DAC SNR (Typ) (dB) 106
  • Sampling rate (Max) (kHz) 384
  • Control interface H/W
  • Resolution (Max)(Bits) 32
  • Software (SW) Control
  • SW-Controlled Gain: –12 dB to +32 dB
  • Power Dissipation < 145mW

MIDI

  • MIDI In/Out Type-A connectors

Display

  • 3rd party various
  • 320x240 TFT w/ Touch
  • IC driver: ILI9341
  • Serial Interface

mvp-01

The reference product design codename "mvp-01" (minimum viable product) is a single chanel audio i/o device with two footswitches, four potentiometers, touch screen and MIDI I/O.