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Topic: The "Beat/Music Detection" code you have always wanted (Read 38232 times) previous topic - next topic


Great code, just what I was looking for, however I could do with some help with wiring the pre amp circuit.
I currently have two audio inputs, switched using a relay, and two audio outputs, also witched using a relay, whilst the audio is going between the two relays is where I want to get the sampling signal from, can I just connect the inputs to the op amps to here?


Is it possible to use an LM358 and +5V power supply instead?



You can see some pictures of the shield I built (and more instructions to follow) here:

could you invite me please, it seams your blog is not open to anybody.
thank you.


I can't send private messages, forum aparently broken :D

I want to build a unicorn-on-a-stick for the next festival that shoots beat-synced lasers from it's eyes :)

Is there any chance one could send me the code via eMail, I promise I wont build anything commercial with it :): lulzufail@gmail.com

thanks in advance and best wishes from Germany!



how can i get the code? it would have been to so much help for me.
this is just the thing i have been looking for! :-) :)


I've written some code for an ATTiny85 chip

It samples music/input and adjusts the zero crossing point of the audio automatically
Using FFT, it samples the music and creates the energy/frequency bands accordingly
Bass frequencies are allowed to pass a variable threshold and create a fixed length ON, followed by an OFF window
This trigger is passed to a sequencer algorithm with an 8 channel cross-fader
The output appears as DMX512 (a second pin also outputs the compliment signal for differential output)

In conclusion, all you need is this chip, a few external components (couple of resistors and caps), an audio in socket and a DMX out socket. My first prototype uses a SN76175 RS485 driver.

A complete Audio to DMX-driven ParCan sequencer/crossfader solution :)


This works well for running RGB LED par cans and PowerPack/Dimmers for mains powered lighting

while (z--) { snoreEvenLouder(); }
www.smartshow.lighting - www.dmx512.lighting


Hi All, I was wondering what one needs to view this awesome Adrunio code in this blog. The Blog ...
http://majordecibel.blogspot.com/ how does one get invited to see this?

Thanks and very much appreciate  :)

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