Counting Intervals in Music Theory
Hey! I am Mark Black and I am here on expertvillage.com. I am here to talk to you about music theory and learning how to read music. There are two parts to an interval, there is the size, or the quality and the quantity then the number of letter names and whether that is a major or minor all diminished to a perfect interval. So another thing I want to talk about right now is that the number of letter names is the most easily identifiable feature of an interval. So from a C to an F is a fourth because it is four letter names C, D, E, F. Whether it is a C flat to an F sharp or C sharp to an F or C to an F sharp, it is still the fourth. So one other thing when someone is mentioning an interval to you, they are talking or you are trying to figure out an interval look at the letter names and you count. It really would not matter if this is treble or bass clef because the number of letter names are going to be the same. I am going to count. 1, 2, 3, 4, 5, 6, 7, 8, 9, this is the 9th, is that many letters, and this from the same to same is called as an unison that is one little trick here, but the main part as we will talk about real quickly about an interval is the quantity, the number of letter names and I just want you to see that this is a 5th: 1, 2, 3, 4, 5 letter names whether that is a treble clef and this is a G to a D, which would be G, A, B, C, D or bass clef then it is B, C, D, E, F. It is still 1, 2, 3, 4, 5 this will be a 5th. Some kind of a 5th augmented 5th, diminished 5th, perfect 5th, we do not know, but that is a 5th.