The coordinator which is also known as the crotch, it is our first note value that is equal to one beat. The coordinate makes up a quarter of the whole bar. Two quarter notes equal a half note, and four quarter notes equal homered. Like the half node, it has a head but it's colored in. It also has a stem and the same rules for whether the stem points up or down apply. That is quarter notes written on or above the line representing B will have the stems pointing down.

Whereas quarter notes line below the note beyond the stave, will have their stems pointing up. Notice that the tempo at the beginning of a piece of music is written using a quarter note to indicate one beat. quarter note equals 70 means that the tempo is moving at a rate of 70 quarter notes a beats per minute. coordinates are also the reason that common time is four beats per bar can also be called for four time, the top four and this time signature represents literally the number four. And the bottom four represents coordinates. So, four quarter notes per bar.

You'd either see the symbol for common time, or the four four time signature at the beginning of a piece of music, never both. From now on, we'll use four four time instead of common time, since it's more frequently used in written music. So look at this example, the time signature is four four, indicating four beats per bar. And the tempo is once again set to 70 beats per minute. We have four quarter notes per bar and then this is how you play it. 1234 In this example, there are still four quarter notes in every bar, but the first beat of each bar is our familiar chord.

Here's how that would sound 1234. Now to indicate silence for one beat, use a quarter wrist also known as a crotchet. wrist, the quarter wrist kind of looks like a backwards s that extends from just above the fourth line to the second line with a little tail. Here we have everything as before, except that there is a quarter wrist on the third beat of bars two and four. Of course, this indicates that there should be silence for these beats. Here's how you play it 1234 in the next lesson, we'll practice writing all these examples.