Percussion sounds with Mozzi

[Sascha Ringel]

Hello,

I'm currently working on an Arduino Nano based pedal which is powered by Mozzi to create percussion sounds. The purpose is to help practicing guitar, so it will have a metronome-like mode and a stomp mode to trigger sounds with foot tapping. All the schematics and source code will be published. It is based on subtractive synthesis with 3 wavetable oscillators, 3 noise-sources and the needed envelopes running at audio-rate. Currently I'm working on a series of articles how to use Mozzi to synthesize different percussion instruments (like kickdrum, snare, hihat and other) - a first article for kickdrum synthesis is now online. I would be happy if you have any feedback or hints to improve it - and thank you for this really nice library! Best regards, Sascha

https://arduinokickstompdrum.wordpress.com/

[staffa...@oscillator.se]

That sounds good! :)

I did something similar, with a very synthetic result: https://youtu.be/xTlGxCow4GA

I'd love to look at your code.

Cheers,

Staffan

SWEDEN

[Sascha Ringel]

Hej Staffan,

of course I know your project(s) - this was also an inspiration for me. The code for the kickdrum is already in the blog (and on GitHub), the rest will be added in the following weeks. I'm aware about the limitations with standard Arduino, but for my purpose this should be sufficient. The Nano is reliable, small and cheap. Most difficult is the hihat (not to talk about cymbals) for me, especially creating colored noise (for noise I dont use samples but a very fast 8-bit random number generator function)..

BRs, Sascha

[staffa...@oscillator.se]

That is great, found your github account.

Good luck with your excellent blog, I will follow your eplorations!

Staffan

[Sascha Ringel]

Thank you Staffan - in the article for the kickdrum are the sourcecodes included as well as a link to GitHub at the end of the page. (https://arduinokickstompdrum.wordpress.com/2021/05/06/01-kick-drum/)

Have a nice weekend! Sascha

[staffa...@oscillator.se]

Thanks a lot for sharing!

That 1st sound, the kick, is waaaaaaaay superior to my results. I based my attempts on this article: https://www.musicradar.com/how-to/how-to-recreate-classic-analogue-drum-sounds-in-your-daw-and-with-hardware

Then I switched from Arduino to the Daisy Seed platform: https://youtu.be/n4_eJM9G5Ms. The hardware is $28 with way more power! :) And a really nice audio DSP library that is quite similar to Mozzi.

Staffan

[Sascha Ringel]

Hello,

I just wanted to let you know that I have added some more articles (on noise algorithms and simple software filters (also with the math for the filter coefficients)). As always - feedback is very welcome!

BRs, Sascha

[staffa...@oscillator.se]

Great stuff Sascha! I expecially enjoyed the tuned noise algoritm.

Thanks a lot for sharing!

Staffan

[Lito Dicdican]

Hi,

Can it be ported to STM32F103 blue pill?

Thanks! 👍

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[Sascha Ringel]

Hi,

I'm not an expert on STM32, but I think it should be no problem - performance is much higher than arduino. The only thing I don't know is about Hifi-mode on blue pill - since I'm using it on my project. So in the final audio-routine there might be some adjustments required.

Ciao, Sascha

[Sascha Ringel]

Hello,

just to inform you that I added some more articles on basics of digital filtering, piezo-trigger circuit and a basic "just-stomp" variant with schematics and sourcecode (https://arduinokickstompdrum.wordpress.com/)
Best regards, Sascha

[Lito Dicdican]

Thanks!

Cheers 👍

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[Staffan Melin (Oscillator)]

Your articles are great -- very informative and well-written!

Thanks a lot for sharing!

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