What is the note called that has 4 beats?

whole note

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The note that has 4 beats is called a "whole note" or a "semibreve."

To understand how we determine the number of beats a note receives, we need to explore the concept of musical rhythm. In standard music notation, each note has a duration or length, represented by the shape of its notehead and other accompanying symbols. The time signature of a musical piece indicates the number of beats in each measure and which note value receives one beat.

In a 4/4 time signature, which is the most common time signature in Western music, the top number (4) indicates that there are four beats per measure, while the bottom number (also 4) indicates that a quarter note (or a note with a filled-in notehead and a stem) gets one beat.

Now, a whole note, represented by an open notehead without a stem, lasts for four beats in a 4/4 time signature. You can count each whole note as "1, 2, 3, 4" or simply tap your foot four times, evenly spaced, to indicate the beats.

So, when you come across a note that is notated as a whole note, you know it will receive four beats in a 4/4 time signature.

Note: Keep in mind that the beats assigned to notes may change based on the time signature. In different time signatures, the same note symbol may represent a different duration.