Are there any instructions? I played around a little bit, but wasn't sure what the intent of everything was.

OMG thank you Kinsey, I already found use for it in sound design!!
I loopedback internally the output of my interface and record the sounds back to the DAW... I'll use the low pitched ones, and only the bottom row of intervals and some combinations to manipulated them on a sesion!! A clean canvas to design tense textures, for transitions and non organic SFXs!

Would be cool if one could adjust the octave of the intervals, I had to wait till a low pitched sample came in every interval😅

Nice tool, thanks for sharing!

the intent is to get used to how the intervals sound—just that. alternatively, you can play more intervals in succession to get used to the difference. As soon as you hear the first tone sound, try to guess the sound of the second tone. it's a mental exercise game.

the frequencies are chosen at random, but tend to go up when chosen an ascending interval and vice versa. the idea was that when I, for example, learn intervals by pressing keys on keyboard, I already know what I am going to press, so my brain isn't really trying to guess, but rather to recall how the next tone sounds—this is to prevent that.

I am not sure what you are trying to achieve, Rodrigo :) to play sine wave intervals in the frequency of your choosing you just have to use a simple synthesizer.

Oh I know, but I don't care. Set up that loopback is as simple as use a synthesizer, I just needed some base tones for a job and they were there ready to sample.