Hardware Platform
Successor to the Jet Platform
Relative of EEl CPU A32 01
Instruments
Instrument Ranges
Overview
A 10,000 foot view of the general instrument design - can be applied to any of the instrument types below.
Common software and hardware components may be shared between them.
Subsystems
MicroController Feature Comparison - Nucleo 476, 432, 303; ESP32
Key Platform Questions
How many analog devices can a given device support? At what sample rate?
How quickly can the chip power on and become operational? From a cold boot? Sleep state?
What is the best arrangement of modules - breakout boards, circuit design? Best for rapid prototyping?
What is the best amplifier/speaker choice for a given platform? Can sound output volume scale up with mass and volume?
How integrated is the DAC to the MC? Does this stage add latency or reduce quality?
MicroController Comparison
Are there any other contenders in this space?
STM Discovery - includes amplifier
No longer available
https://www.mouser.com/ProductDetail/STMicroelectronics/STM32F4DISCOVERY?qs=J2qbEwLrpCGdWLY96ibNeQ%3D%3D&gclid=EAIaIQobChMI5Z_o8ub73AIVkIqzCh2EogDzEAAYASAAEgLv-vD_BwE
ArmStrap Eagle - $60
http://armstrap.org/eagle/
DE0 Nano - $100 FPGA
https://www.adafruit.com/product/451?gclid=EAIaIQobChMIsP2y2c2E3QIVGITICh1NXQgREAYYAiABEgIK4PD_BwE
Ototo: includes speaker and amp
https://www.kickstarter.com/projects/905018498/ototo-make-music-from-anything?ref=category
bunch of similar projects: https://sensorium.github.io/Mozzi/gallery/
Allwinner A13, is a 1GHz ARM Cortex-A8 w/Mali
HN Thread about it - containing this synth comment
Arduino MKR Vidor - https://store.arduino.cc/usa/arduino-vidor-4000
Includes FPGA, HDMI, WiFi, PCIexpress
Instrument Types
- Toy: low-cost (<$30), battery powered (2xAA), simple (5-10 inputs). Monophonic.
- Full: more expensive, louder, larger (like an acoustic guitar). May be generator powered. More inputs. 3 octave range, polyphonic.
- Hyper: many inputs, high expressivity. Elegant. Full range, polyphonic, versatile. Costly. High build quality.
Modularity
Which modules can be conveniently separated?
- Controls
- connector?
- daisy-chained Charlieplex network?
- KNOB QUAD 01
- Fins - Input Designs
- Control multiplexers
- wideband connector?
- input lines? protocol?
- Sensors
- FSRs - connectorized?
- Piezo - same connectors? Small slotted screw?
- 2 or 3 conductors typical? Noise concerns with adding a connector?
- KEY CHROM 01
- Amplifier Breakout (sub-mini size)
- Computer interface
- Debug console - serial? over usb? FTDI required?
- Reprogramming
- Configuration
- Main board interface
- Female header/shield interface?
- Or solder directly to mainboard?
- Design PCB for the whole package?
- PowerTrain
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