The first interval we're going to discuss
is a unison. Now, we saw a unison earlier
when we were talking about the fact that you
can replace playing the fifth fret on one
string with playing it as the open string
below it, because this note would be an A,
E, F, F sharp, G, G sharp, A. This next string
is the A string. Now, if you play those two
notes together. This A on this string and
this A on this string, they're the same frequency.
So, if you played those two notes together
you have what's called a unison interval.
Essentially an interval of zero where you've
got two notes of the same frequency being
played at exactly the same time. Now, the
other intervals that we're going to talk about
involve adding different notes after the first
note is struck.
