https://github.com/copych/esp32-dualcore-i2s

Proof of concept for dual core sound synthezis via i2s
https://github.com/copych/esp32-dualcore-i2s

arduino esp32 i2s multithreading sound synthesizer

Last synced: about 2 months ago
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Proof of concept for dual core sound synthezis via i2s

• Host: GitHub
• URL: https://github.com/copych/esp32-dualcore-i2s
• Owner: copych
• Created: 2022-11-13T18:52:55.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2022-11-14T18:59:11.000Z (about 2 years ago)
• Last Synced: 2023-03-08T08:28:31.441Z (almost 2 years ago)
• Topics: arduino, esp32, i2s, multithreading, sound, synthesizer
• Language: C++
• Homepage:
• Size: 16.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ESP32 multitasking dual core sound synthesis

Proof of concept for ESP32 dual core multithread sound synthesis.

This sketch creates 2 tasks -- one for each of two Xtensa LX6 cores. Each task generates a Sin() signal of a given frequency. One of the tasks then sums the buffers and writes the result to i2s DMA buffer. Data safety is based on a xTaskNotifyGive() / ulTaskNotifyTake().

Sampling rate is 44100Hz, samples are 16bit stereo.

Project was compiled in ArduinoIDE with ESP core 2.0.5.

Hardware is ESP32 DevKit with a PCM5102 extenal DAC connected to GPIOs 5, 18 and 19.

Initial code for a single core and internal DAC was taken from here: https://github.com/infrasonicaudio/esp32-i2s-synth-example