Faust echo

Simple echo effect using Faust on ESP32 board.

Set up

Follow this tutorial.

Build

1. First lets convert FaustEcho.dsp to FaustEcho.cpp

./faust.sh

2. Now we need a manual step. In FaustEcho.cpp we need to movefRec8 from mydsp class to the global scope, make it static and add EXT_RAM_ATTR to it, so that it becomes:

static float fRec8[262144] EXT_RAM_ATTR;

class mydsp : public dsp {
   // ...
}

3. Flash the micro controller:

./flash

Links

• https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html
• espressif/arduino-esp32#595 (comment)

Todo

• possibly add a pot or use buttons to control volume