I've got some clone nano boards
I'm using Mozzi sand while playing music from sensors at random times between 2 ans 20 seconds I hear do, do do di di da play very quickly in the music when not wanted any ideas?
The sound is exactly the same and so far not on all boards
What exactly does that mean ? Sensors don't usually output music
Please post a sample sketch that illustrates the problem and a schematic of your project giving details of all devices being used. A picture of a hand drawn circuit is good enough
Sorry but we can only know what you tell us, and so far you are giving us very little to go on.
As @UKHeliBob says we need both schematic and code in order to provide specific help. Otherwise all we can do is guess at the problem, like I think the problem is in line 67, as indicated on my crystal ball. Or your input sensors, what ever they are, are presenting a floating input and are picking up interference producing false triggering.