https://github.com/todbot/mozzi_experiments
Experiments with Mozzi, mostly on SAMD21 & RP2040 chips
https://github.com/todbot/mozzi_experiments
Last synced: 9 months ago
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Experiments with Mozzi, mostly on SAMD21 & RP2040 chips
- Host: GitHub
- URL: https://github.com/todbot/mozzi_experiments
- Owner: todbot
- License: gpl-3.0
- Created: 2021-12-28T22:39:48.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2024-07-01T00:35:23.000Z (almost 2 years ago)
- Last Synced: 2025-08-28T16:51:15.186Z (9 months ago)
- Language: C++
- Homepage:
- Size: 367 KB
- Stars: 100
- Watchers: 10
- Forks: 11
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# mozzi_experiments
Experiments with Mozzi, mostly on SAMD21- and RP2040-based boards
## Sketches
* [eighties_dystopia](eighties_dystopia/eighties_dystopia.ino) - A swirling ominous wub that evolves over time
* [eighties_dystopia_rp2040](eighties_dystopia_rp2040/eighties_dystopia_rp2040.ino) - Same thing, but on a Raspberry Pi Pico w/ PWM audio
* [eighties_dystopia_rp2040_i2s](eighties_dystopia_rp2040_i2s/eighties_dystopia_rp2040_i2s.ino) - Same thing, but on a Raspberry Pi Pico w/ I2S DAC
* [eighties_arp](eighties_arp/eighties_arp.ino) - An arpeggio explorer for non-musicians and test bed for my "Arpy" arpeggio library
* [eighties_drums](eighties_drums/eighties_drums.ino) - simple 4-channel drum machine w/ sequencer
* [derpnote2](derpnote2/derpnote2.ino) - Tries to recreate THX "Deep Note" sound
* and others in the repo
## Demos
* "derpnote2" - [demo on youtube](https://www.youtube.com/watch?v=7fX8cBwbOmU)
* "eighties_drums" - [demo on youtube](https://www.youtube.com/watch?v=Jtr5wm48R7A)
* "eighties_dystopia" - See [this Twitter thread](https://twitter.com/todbot/status/1475970495400923137) or
[this blog post on Adafruit](https://blog.adafruit.com/2021/12/29/make-your-own-80s-dystopian-music-soundtrack-qtpy-arduino-todbot/)
or this video below
https://github.com/todbot/mozzi_experiments/assets/274093/b39463fb-55a2-458a-9ce9-b2939a42408d
* "eighties_arp" - click for [youtube video](https://www.youtube.com/watch?v=Ql72YoCJ8-8)
[ ](https://www.youtube.com/watch?v=Ql72YoCJ8-8)
## How to install Mozzi
Mozzi 2 is now in the Arduino Library Manager! And it's much easier to configure.
To install Mozzi, find it in the Arduino Library Manager and install it and its
dependencies.
## Configuring Mozzi
You can now configure Mozzi in your sketch intead of editing Mozzi library files.
The [hardware configuration section](https://sensorium.github.io/Mozzi/doc/html/hardware.html)
of the Mozzi docs is very helpful.
The pattern is that you put this at the top of your sketch:
```c++
#include "MozziConfigValues.h" // for named option values
// your system-specific configuration defines, including MOZZI_CONTROL_RATE
#include "Mozzi.h"
```
The configs I've used so far. Some of these configs are the defaults but I like
to be explicit.
- SAMD21 boards using DAC on A0 as output:
```c++
#include "MozziConfigValues.h" // for named option values
#define MOZZI_ANALOG_READ MOZZI_ANALOG_READ_NONE
#define MOZZI_CONTROL_RATE 128 // mozzi rate for updateControl()
#include "Mozzi.h"
```
- RP2040 boards (including Raspberry Pi Pico) using PWM audio out:
```c++
#include "MozziConfigValues.h" // for named option values
#define MOZZI_OUTPUT_MODE MOZZI_OUTPUT_PWM
#define MOZZI_ANALOG_READ MOZZI_ANALOG_READ_NONE
#define MOZZI_AUDIO_PIN_1 0 // GPIO pin number, can be any pin
#define MOZZI_AUDIO_RATE 32768
#define MOZZI_CONTROL_RATE 128 // mozzi rate for updateControl()
#include "Mozzi.h"
```
- RP2040 boards using I2S DAC audio out:
```c++
#include "MozziConfigValues.h" // for named option values
#define MOZZI_AUDIO_MODE MOZZI_OUTPUT_I2S_DAC
#define MOZZI_AUDIO_CHANNELS MOZZI_STEREO
#define MOZZI_AUDIO_BITS 16
#define MOZZI_AUDIO_RATE 32768
#define MOZZI_I2S_PIN_BCK 20
#define MOZZI_I2S_PIN_WS (MOZZI_I2S_PIN_BCK+1) // HAS TO BE NEXT TO pBCLK, i.e. default is 21
#define MOZZI_I2S_PIN_DATA 22
#define MOZZI_CONTROL_RATE 128 // mozzi rate for updateControl()
#include "Mozzi.h"
```
## Using Mozzi
- Mozzi is very particular about what is in `loop()`. Do not put anything else in there.
Instead put it in the `void updateControl()` function. See the sketches for examples.
## Any questions?
Open up an issue on this repo or contact me on [@todbot@mastodon.social](https://mastodon.social/@todbot/)!