Shared Projects by jmtalbert

A PCB circuit board designed to mount the Sparkfun Codec Module with the Sparkfun ESP32 Thing Plus C. Includes a MIDI I/O interface along with convenient pads and header for connecting external controllers. This is an audio development project based on the ESP32 WROOM 32E processor with a WM8960 Codec.

With Effects software package and docs at https://www.jtalbert.xyz/ESP32/

This is a four-voice programmable synthesizer built with the ESP32 DevKit. The four voices are built from signals generated on 4 ESP32 output pins connected to 4 multiplying MCP4921 DAC chips used for volume control. Two of the pins can be programmed as 8-bit DACs to produce any type of waveform. All four can be programmed to produce square waves and PWM pulse waves. If the pulse is fed random width values it becomes pitched noise.

Two additional ESP32 pins are connected to onboard circuits for MIDI INPUT and OUTPUT.

Among its many applications, the Synth can be programmed to simulate an AY Arcade Game Sound chip from the 70’s using old YM sound files still available on the web.

Full documentation and YM files at https://jtalbert.xyz/ESP32/

A combination Waveform Generator and Modulator. Triangle and Pulse waveforms are used to distort a mix of unipolar audio inputs using a unique kind of modulation. PDF description at https://jtalbert.xyz/Other/

Designed to connect an ESP32 DevKit to the ES8388 PCB_Artists Audio Codec Module. It also includes a MIDI Input and Output interface and a convenient set of pads and headers for attaching external controllers and sensors to available ESP pins.

With a complete Codec Effects Software package for the ESP32. Includes full documentation PDF at https://jtalbert.xyz/ESP32/