esptool.py --chip esp32 --port [port] --baud 921600 read_flash 0x210000 0x1f0000 spiffs.bin
mkspiffs -u spiffs/ spiffs.bin
NOTE: You can get mkspiffs from https://github.com/igrr/mkspiffs.
-
display: show sustain plateau as dashed / dotted line
-
display: show envelope values
-
display: add extra padding before text in black rectangles
-
display: check for parameter cache initialization
-
fix: sustain = 0 does not work
-
improve velocity -> amplitude mapping
-
review sync logic in synth_calculate_buffer()
-
should envelope be in amplitude or in "power"? (log-scale)
-
using a look up table for sin() could probably remove need for buffers
-
include hard and/or soft reset in audio codec driver
-
figure out this warning: ../main/signal_generator.c:48:5: warning: variably modified 'buffer' at file scope
- add more voices
- add simple sequencer
- add filters
- SparkFun MIDI Shield: https://www.sparkfun.com/products/12898
- https://www.pjrc.com/store/teensy3_audio.html
- What does capless mean: https://www.electronicproducts.com/design-considerations-for-driving-headphones/
- example for a GPIO expander with ADCs (for controls): MAX11603EEE
- https://www.notesandvolts.com/2012/01/fun-with-arduino-midi-input-basics.html
- https://www.youtube.com/watch?v=GxfHijjn0ZM
- https://www.instructables.com/Send-and-Receive-MIDI-with-Arduino/
- https://www.pjrc.com/teensy/td_libs_MIDI.html
- https://learn.sparkfun.com/tutorials/midi-tutorial/all
- https://www.cs.cmu.edu/~music/cmsip/readings/Standard-MIDI-file-format-updated.pdf
- https://github.com/midibox/esp32-idf-uartmidi
- Guenther-Chiptune: https://www.youtube.com/watch?v=msIQIWeMnBE