Audio reactive or sound reactive?

Hi,
I am new to the world of WLED, I want to install a mic to make the leds react with music.
I am a bit confused, is audio reactive different than sound reactive?
Another quick question is about the GUI FX filter category which has 1 music note and the one with 2 music notes. What’s the difference between them?

Soundreactive => 0.13.4 fork by atuline
Audioreactive => 0.14 (implemented as usermod)

one note - volume reactive
two/double note - frequency reactive

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thanks! I spent a lot of time trying to figure out the one/double note symbol!!

one question for the grid icon :slight_smile:
How will I make it work properly should I have create a 2d led panel? What dimensions should be sufficient? 20x20 for example?