DRUM_2024_V1

ESP32 DRUM SYNTH MACHINE

This is my DRUM SYNTH LOFI MACHINE.

Synth engine:

• Wavetable synthesizer based on DZL Arduino library "The Synth"
• 16 sound polyphony
• Sound parameters: Table, Length, Envelope, Pitch, Modulation, + Volume, Pan and Filter.
• Filter (LowPassFilter) comes from Mozzi Library

SEQUENCER:

• 16 step/pattern editor and random generators (pattern, sound parameters and notes)

Hardware:

• Lolin S2 Mini (ESP32 S2)
• PCM5102A I2s dac
• 24 push buttons (8x3)
• Rotary encoder
• OLED display I2c
• 32 LED WS2812B

Software:

IDE: Arduino 1.8.19 (Won't compile with 2.x!)

Boards: Expressif Systems 2.0.14 (Tested fine up to 2.0.17)

Board: Lolin S2 Mini

Necessary Libraries:

• Sequencer Timer - uClock
• RGB Leds - Adafruit Neopixel
• OLED - u8g2
• Button input - Keypad

Notes:

Schematics uploaded.

STL 3D model uploaded.

Cheat sheet style PDF uploaded.

Join solder pads near SCK pin on PCM5102A module.

Update:

• Solder pads on the back of PCM5102A module (more info)

  • H1L: FLT - Low

  • H2L: DEMP - Low

  • H3L: XSMT - High

  • H4L: FMT - Low

Video demo of the prototype:

Prototype:

PCB, PROJECT & FINAL LOOK:

https://oshwlab.com/zircothc/esp32-drum-synth-lofi-machine

https://easyeda.com/editor#project_id=08f629c08b18444ca16accbb2242c0fb

PCB

PARTS MOUNTED

SIZE: FINAL BUILD vs PROTOTYPE

TWO MACHINES IN SYNC