This repo demonstrates a single file solution for running hvcc sources on the ESP32-devkitc, inspired by the Faust ESP32 architecture example. The hvcc compiler leverages the use of (a subset of) puredata operators on the cheap and fast esp32 uprocessor. The ESP32-devkitc combined with one PCM5102 CODEC, one WM8731 CODEC and an 8 port MCP3208 ADC provides a complete and available audio development platform with a very reasonable pricetag. UI provided via 4 buttons, 4 potentiometers and 4 leds.
The goal of this development is to realise a generic eurorack module that is based on the ESP32 and programmable via puredata. Each cheap module consists of four control voltage inputs and four audio / cv outputs (all io -5v -> +5v and fully eurorack compatible). All parts are easily obtainable and all software and hardware is open source, so ordering your own set of PCB's is also possible
15-nov-2020: Replaced one of the PCM5102 with a WM8731 to have audio stereo line in over i2s
25-oct-2020: PCB design ready, gerbers generated and boards ordered.
18-oct-2020: Code cleanup and PCB design ongoing. Current schematic tested and working!
- Install Espressif IoT Development Framework 4.1, the official development framework for ESP32.
- Install the hvcc compiler
- Clone this repo
Check the Kicad schematics in the schematics folder
- Create your puredata patch, using the supported objects only. Use
tabreadwith a $0-array instead of thetableobject, seems to work better. - Issue a Issue a
python2.7 hvcc.py input.pd -o ./heavy/to generate the source files, where input.pd is your puredata patch - MAC: compile using hvcc and libs and copy to project subdir:
python2.7 hvcc.py esp32_2.pd -p ./Hoclib/ ./Josephlarralde/ ./ParkinsonHashizume/ ./MikeMorenoAudio/ ./Heavylib -o ./heavy/ ; cp ./heavy/c/Heavy_heavy.* ~/Documents/GitHub/esp32-hvcc/main/heavy/ - WIN: compile and copy:
c:\Python27\python.exerest as above, then acopy /Y heavy\c\Heavy_* c:\Users\Arthur\Github\esp32-hvcc\main\heavy - Add all heavy c and cpp sources to /main/CMakeLists.txt (only when adding new objects)
- Run
idf.py -p /dev/tty.SLAB_USBtoUART flash monitorto compile, upload and monitor the esp32 binary - MAC:
idf.py -p /dev/cu.usbserial-1A14301 -b 921600 flash monitor - WIN:
idf.py -p COM4 -b 921600 flash monitor - Enjoy your pd patch!
A large and nice sounding puredata patch from "manwithfeathers" on rebeltech.org named "Fascination IV" yields about 60% performance of the ESP32 which looks like a very nice performance / cost ratio!