@christian: I am glad to hear that you got my firmware working! I just now realized you were using nano to refer to the NS1 and not an Arduino Nano. Sorry for the confusion. Remember that the firmware has extra features like an extra audio rate square wave oscillator as well as a lofi noise source; it is not just an LFO. 🙂
It sounds like you will be having a lot of fun with your two NS1 synths! If you happen to use Reaktor, check out my free set of modular blocks.
@christian: It looks like your Nano does not have the MCP49xx DAC. That is used to get a really smooth LFO. Just use a filtered PWM pin to output the LFO. You will need to adjust the values of the PWM output. It will not be as clean as the DAC output, but it will work.
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