Mozzi sound synthesis library for Arduino - how to make it work on the Core2

oscillator

Hi!

Has anyone got the Mozzi library to work on the M5Stack Core2? It now has support for ESP32.

I can compile Mozzi examples but don't know how to get audio output through the internal speaker.

Mozzi: link

Any help welcome!

oscillator

OK, so I think I have figured out how to make Mozzi sound through the internal speaker.

In AudioConfigESP32.h change these lines to:

// Set output mode
#define ESP32_AUDIO_OUT_MODE PT8211_DAC

// For external I2S output, only: I2S_PINS
#define ESP32_I2S_BCK_PIN 12
#define ESP32_I2S_WS_PIN 0
#define ESP32_I2S_DATA_PIN 2

(Ref: https://github.com/m5stack/M5-ProductExampleCodes/blob/master/Core/M5Core2/Arduino/record/record.ino)
It seems to work, even though the Core2 uses the NS4168 I2S amp.

In your code, put this at the top:

#include <M5Core2.h>

obviously, and in the setup():

M5.begin();
M5.Axp.SetSpkEnable(true);

Put

M5.update()

in the updateControl() function.

Also, in the Arduino IDE, set PSRAM: Disable.

oscillator

So now I've got a drum machine with 6 drum sounds (VA - not samples), and a bass synth up and running.

I have created a simple editor for the drum sounds -- on to make the synth note editor and the synth sound editor (it has selectable waveforms, a LPF and an ADSR envelope, plus a 2nd detunable oscillator).

oscillator

And here are the synth sound editor and the piano roll where you enter/edit the notes for the synth.

oscillator

Here is the main menu. The engine is running three editable synths and a 5 voice drum machine (kick, snare, hihat open/closed, tom hi/lo, clap/crash).

oscillator

Drum sound editor

and drum editor!

oscillator

Song mode (arranging sequences in programmed order)

and a primitive though useful mixer for the three synths and all the drum sounds!

oscillator

Last thing on the list is data save/load (maybe even MIDI export), sequence copy function, demo, manual. Then I will release the project under a GPL license.

AgreeDK

@oscillator looking forward to try it 👍

oscillator

@agreedk said in Mozzi sound synthesis library for Arduino - how to make it work on the Core2:

@oscillator looking forward to try it 👍

Thanks a lot @AgreeDK, just a few more days and it will be finished! :)

oscillator

The finished project with source code and video demo:
https://community.m5stack.com/topic/3584/oscpocketm-portable-beat-production-tool-for-the-m5stack-core2

AgreeDK

Great work, got it installed, looks nice, now i just need time to Play with it.

oscillator

@agreedk said in Mozzi sound synthesis library for Arduino - how to make it work on the Core2:

Great work, got it installed, looks nice, now i just need time to Play with it.

Thank you! :)

I've got audio output using the DAC to work now so it is easy to output the sound to a speaker or mixer. The instructions are in the updated PDF manual.

rodberry

@oscillator congratulations Staffan, I'm a year late to the party but just wanted to say this is a lot of fun and I really appreciate the thorough documentation and the very readable code (speaking as a C-phobic beginner programmer).

I'm planning to make this into a module for my AE format modular synth. For now, I'll start by just feeding it into a converter but will eventually get the other components organised to make it work nicely in the system with my other modules. At least you have given me a nice wagon to fall off! :)

oscillator

@rodberry said in Mozzi sound synthesis library for Arduino - how to make it work on the Core2:

@oscillator congratulations Staffan, I'm a year late to the party but just wanted to say this is a lot of fun and I really appreciate the thorough documentation and the very readable code (speaking as a C-phobic beginner programmer).

I'm planning to make this into a module for my AE format modular synth. For now, I'll start by just feeding it into a converter but will eventually get the other components organised to make it work nicely in the system with my other modules. At least you have given me a nice wagon to fall off! :)

Cool, I am glad you find it useful! The AE modular seems great.

I can also recommend the Daisy Seed, for which I've done a few projects:
https://www.oscillator.se/opensource/#daisy

Good luck with your projects -- and your music! :)