In ETC, what is etc.audio_in?

[chrisk]

The etc.audio_in is an array of 100 samples of the amplitude of the audio input. More information here:

Etc.audio_in

There is a little more info about the sampling rate and 100 point array here: Basically it is updated 36.75 times a second in the background. Position 99 would be the most recent. To check for threshold you could do a for loop, it might not slow down too much. But there is also the etc.audio_trig flag that gets set when audio exceeds a threshold, might be useful. The threshold is hard coded at around 80% full volume.