Oh okay lol.
For echo, the amount is how many times the input audio will echo back, decay determines how much quieter each echo is, spacing is how far apart each echo is, and strength is how loud the total echoes are.
The beatbox has a lot of options too, but they could all be summed up as the “envelope” of the sound. Attack is how long it takes for a note to reach full volume when it first plays, decay is how long it takes to fade out after that. Sustain is how loud you want the audio to stay after it’s decayed, and release determines how long it should take to become completely silent.
Percussion would be something that you could bring in as a sample, I don’t really have my own drumset in game yet lol.
I’m not sure what else you might want explained but I’ll answer as long as you ask. Thanks for all the feedback