Too much to address in a comment, best to look up a music theory primer but I'll attempt to summarize. Chord = multiple notes played together. There are diffe

Too much to address in a comment, best to look up a music theory primer but I'll attempt to summarize. Chord = multiple notes played together. There are different ways to arrange the notes within the chord but a common example would be a major chord with consists of the root note, and then a note that is a 3rd above that, and then a 5th above that. For example a C major chord would be C-E-G. An arpeggio is a rapid succession of notes within a chord. Instead of playing the notes in a chord all at once you cycle through them in some pattern. Typically ascending but as you can see from the tool there are lots of options. Modes are similar to the scale but I've never learned them well enough to explain it. Altering the mode gives the "scale" a different quality sound. Think about the white and black keys on the piano and how they are not evenly spaced. If you start on C and play all the way to the next C one note at a time it sounds like one scale but if you do the same thing shifting one note higher it is going to sound completely different (not just shifted higher in pitch) it actually has a different quality.