Simple meter is a meter type in which each beat divides naturally into two equal parts, signaled by a time signature with an upper number of 2, 3, or 4 (duple, triple, or quadruple). In simple meters, the lower number of the time signature tells you which note value gets the beat.
Simple meter answers one question about a piece of music. When you tap the beat, does each beat split into two equal parts? If yes, the meter is simple. That is the whole test. In 4/4 (common time), the quarter-note beat splits into two eighth notes, so 4/4 is a simple meter. Same logic for 2/4 and 3/4.
The CED says every meter type is built from two relationships. First, the beat-to-division relationship tells you simple (divides in 2) versus compound (divides in 3). Second, the beat-to-measure relationship tells you duple (2 beats per bar), triple (3), or quadruple (4). You always name both. So 4/4 is simple quadruple, 3/4 is simple triple, and 2/4 is simple duple. In a simple time signature, the upper number is 2, 3, or 4 and the lower number tells you the beat value directly. A 4 on the bottom means the quarter note gets the beat. That "bottom number = beat value" shortcut only works in simple meter, which is exactly why the distinction matters.
Simple meter lives in Unit 1: Music Fundamentals I, specifically Topic 1.7 (Meter and Time Signature), and it directly supports two learning objectives. AP Music Theory 1.7.A asks you to describe the meter type in both performed and notated music, meaning you might hear a recording and have to decide whether the beat divides in twos or threes. AP Music Theory 1.7.B asks you to describe what a time signature actually communicates, which requires knowing that simple and compound signatures encode different information in the bottom number. Simple meter is also a foundation skill. Every rhythm dictation, sight-singing example, and notation question for the rest of the course assumes you can instantly read what the beat is and how it divides. Get this wrong in Unit 1 and rhythmic dictation in later units gets much harder.
Keep studying AP Music Theory Unit 1
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view galleryCompound Meter (Unit 1)
Compound meter is the other half of the beat-to-division question. In compound meters like 6/8 or 9/8, each beat divides into three parts instead of two, and the beat is a dotted note. Hearing the difference (does the music lilt in threes or march in twos?) is one of the most common aural tasks tied to Topic 1.7.
Time Signature (Unit 1)
The time signature is how simple meter shows up on paper. An upper number of 2, 3, or 4 flags the meter as simple, and the lower number names the beat value. Memorize the pairing of upper numbers to meter types and you can classify any standard signature on sight.
Beat Division (Unit 1)
Beat division is the underlying concept simple meter is built on. "Simple" literally means the division is two equal parts. This also explains borrowed divisions like triplets, where three notes temporarily squeeze into the space the normal two-part division would fill.
Asymmetrical Meter (Unit 1)
Simple and compound meters are symmetrical because every beat in the bar is the same length. Asymmetrical meters like 5/8 or 7/8 mix beat lengths within a measure. Knowing simple meter cold is what lets you recognize when a meter breaks that even pattern.
Simple meter shows up most in multiple-choice questions, both aural and non-aural. Aural stems play an excerpt and ask you to identify the meter type, so you need to find the beat by tapping along and then listen for whether it splits into twos (simple) or threes (compound). A 9/8 excerpt, for instance, tests whether you tap the dotted-quarter beat instead of every eighth note. Non-aural stems test the definitions directly, like asking which characteristic defines a simple meter (beats divide into two equal parts) or how simple and compound rhythmic structures differ. Triplets are a favorite trap. In simple meter, a triplet bracket over three eighth notes means they fill the duration of one quarter-note beat, borrowing a three-part division inside a two-part meter. Beyond MCQs, simple meter is baked into the rhythm-based FRQs. Melodic dictation and sight-singing prompts are written in specific meters, and you have to notate or perform rhythms that fit the given beat and division correctly.
Both are meter classifications, but they answer the beat-division question differently. In simple meter the beat divides into two equal parts and the bottom number of the time signature is the beat value (in 3/4, the quarter note gets the beat). In compound meter the beat divides into three equal parts, the beat is a dotted note, and the bottom number shows the division, not the beat (in 6/8, the eighth note is the division and the dotted quarter is the actual beat). Quick check on the page: if the top number is 2, 3, or 4, it's simple; if it's 6, 9, or 12, it's compound. Quick check by ear: count "1-and, 2-and" versus "1-la-li, 2-la-li."
Simple meter means each beat divides into two equal parts, while compound meter means each beat divides into three.
An upper time-signature number of 2, 3, or 4 tells you the meter is simple, and it also tells you whether the meter is duple, triple, or quadruple.
In simple meters only, the bottom number of the time signature names the note value that gets the beat, so 4/4 means four quarter-note beats per measure.
Full meter names combine both relationships, so 4/4 is simple quadruple, 3/4 is simple triple, and 2/4 is simple duple.
A triplet in simple meter is a borrowed division: three notes fill the time normally occupied by the two-part division of one beat.
To identify meter by ear, tap the beat first, then listen for whether it subdivides in twos (simple) or threes (compound).
Simple meter is a meter in which each beat divides into two equal parts. Common examples are 2/4 (simple duple), 3/4 (simple triple), and 4/4 (simple quadruple), and identifying it is part of learning objective AP Music Theory 1.7.A.
In simple meter the beat divides in two and the bottom number of the time signature is the beat value. In compound meter the beat divides in three, the beat is a dotted note, and the bottom number shows the division instead. Top numbers 2, 3, 4 mean simple; 6, 9, 12 mean compound.
No. 6/8 is compound duple, not simple. The upper number 6 signals a compound meter with two dotted-quarter beats per measure, each dividing into three eighth notes. Don't read it as six quarter-style beats.
3/4 is simple triple. It's simple because each quarter-note beat divides into two eighth notes, and triple because there are three beats per measure. The "3" describes beats per bar, not a three-part division.
Yes. A triplet bracket over three eighth notes in simple meter means those three notes share the duration of one quarter-note beat. It temporarily borrows compound meter's three-part division without changing the time signature.
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