What exactly is the difference between a jazz instrument and a pop instrument?
All the answers to these questions are available on their websites; however, I think I can answer these questions for you myself (see below for a link to each question’s FAQs).
A note about the “differences” between chords and modes
To begin with, I should explain the main distinction between chords and modes of harmony. In some cases, chords can be treated as “natural” tones, while in others, modes are a special class of chords which carry a special type of tone (an octave, or pitch, above natural). As far as I can tell, chords and modes have the same sound (a pitch over the chord, or above or below the chord), but each have their own peculiar flavor. And this sounds all the more confusing if you need to use two chords to describe the same relationship between two keys (think: “the third chord is above the third key.” And, for the second example, “the third chords is [at the] same keys as is the fourth chords”).
And yet, that is where “harmony” ends! In harmony, each chord sounds in the key of the main chord. In other words, when you hear “the third chord” on the piano, it sounds exactly like how it does on the guitar, since they both have the same sound, but there are some slight differences. So…
The first way to think about these “differences” is from a musical standpoint: chords are not just a way to create different sounds for the same harmonic structure, but an actual way to form sounds by interacting with the harmonic structure. Harmonies are a way of constructing sounds that actually have some relationship to a given fundamental tone (natural note) and/or key and shape (as seen in the previous points). This is the main reason why there are so many chords in a music composition — they are all for that purpose!
So how does this relate to our question? In most music — especially jazz or blues music — there is no fundamental (natural) note or “key” that is represented by that particular chord — they are all for the purpose of making sounds that the listener will hear and will also have some relationship to the fundamental tone. And yet — that is where the similarity ends!
In order to make good jazz guitar playing, it’s extremely important that you have a good ear for chords and modes. In theory, these can be