Getting Started
Just as rhythm organizes music in time, tempo governs the speed at which that time flows. Understanding tempo is fundamental to interpreting the overall character and energy of a piece, from a slow, solemn funeral march to a fast, brilliant scherzo. This concept provides the framework for how performers translate written notes into a living, breathing musical experience.
What You Should Be Able to Do
Identify and define common Italian tempo markings in a musical score.
Distinguish between markings that establish a tempo and those that modify it.
Explain the function of a metronome marking in providing a precise tempo.
Aurally recognize the effects of tempo adjustments like accelerando and ritardando in a performance.
Describe how changes in tempo can be used to shape musical phrases and delineate formal sections.
Key Concepts & Analysis
While tempo establishes the overall speed of the music, composers often manipulate it to clarify or enhance the musical form. A change in tempo can signal the arrival of a new section, add expressive weight to a cadence, or create a seamless transition between two different musical ideas. By viewing tempo through the lens of form and cadence, we can see it not just as a clock, but as a powerful tool for musical storytelling.
Tempo and Musical Form
The speed of the beat pulse—the steady, underlying pulse of the music—is a primary determinant of a piece's character. Composers use specific markings to set this speed and to guide the performer in shaping the music's structure over time.
Establishing a Baseline Tempo
Most pieces or movements operate under a single, prevailing tempo that establishes its fundamental character. This is indicated at the beginning of the score with a word or a metronome marking.
Tempo Markings: These are typically Italian words that describe the speed. Common examples include Largo (very slow), Moderato (moderate speed), and Allegro (fast). These terms often carry connotations of mood as well as speed; for instance, Allegro also suggests a cheerful or bright character.
Metronome Markings: For greater precision, a composer may include a metronome marking, which indicates the exact number of beats per minute (BPM). This is written as a note value equal to a number (e.g., ♩ = 120, meaning 120 quarter-note beats per minute).
Tempo as a Structural and Expressive Tool
Composers use changes in tempo to highlight the musical form and to create expressive effects. These changes can be gradual or abrupt, and they often occur at key structural points, such as the end of a phrase or the transition to a new section. The following table organizes the most common terms.
| Category | Term | Definition | Typical Use in Form & Cadence |
|---|---|---|---|
| Gradual Speeding Up | accelerando (accel.) | A gradual increase in tempo. | Used to build excitement, often in a transition leading to a new, faster section or a climactic moment. |
| Gradual Slowing Down | ritardando (rit. or ritard.) | A gradual decrease in tempo. | Very common in the final measures of a piece or section to add weight and finality to the concluding cadence. |
| Abrupt Slowing Down | ritenuto (riten.) | An immediate, more sudden slowing of the tempo. | Used for a momentary dramatic effect, often to emphasize a specific chord or to signal a brief hesitation. |
By controlling tempo, a composer guides the listener through the musical landscape, slowing down to signal an ending or speeding up to build anticipation for what is to come.
Data & Organization Tools
To effectively analyze and perform music, it is essential to know the relative speeds implied by the most common Italian tempo terms. The following table organizes these terms on a spectrum from slowest to fastest, providing a quick reference for their general meaning.
| Category | Italian Term | Approximate Meaning |
|---|---|---|
| Very Slow | Largo | Broad, very slow |
| Slow | Adagio | Slow and stately |
| Moderate | Andante | At a walking pace |
| Moderate | Moderato | A moderate speed |
| Fast | Allegro | Fast, quick, and bright |
| Very Fast | Presto | Very fast |
Evidence Bank
Tempo: The speed of the beat pulse in a piece of music. It dictates how fast or slow the music is performed.
Beat Pulse: The steady, recurring emphasis in music that provides the underlying grid for rhythm.
Metronome Marking: A precise indication of tempo expressed in beats per minute (e.g., ♩ = 72), specifying exactly how many of a certain note value should occur in one minute.
Largo: An Italian tempo marking indicating a very slow, broad, and dignified speed.
Moderato: A marking indicating a moderate or medium tempo, neither excessively fast nor slow.
Allegro: A common tempo marking for a fast, lively, and bright speed.
Accelerando (accel.): A directive to gradually increase the speed of the music, often used to build energy.
Ritardando (rit. or ritard.): A directive to gradually slow down the tempo, typically used to signal the end of a phrase or section.
Ritenuto (riten.): A directive to immediately slow down, often more abruptly than a ritardando, for momentary expressive emphasis.
Skill Snapshots
Establishing a Baseline: A score is marked Allegro at the beginning. This term establishes the prevailing fast and bright character for the entire piece or movement, unless another marking appears.
Signaling Closure: A composer writes ritardando over the final two measures of a piece. This indicates that the performer should gradually slow the tempo to give a sense of weight and finality to the concluding authentic cadence.
Creating Dramatic Emphasis: A passage is marked ritenuto on a single beat or over a single measure. This directs the performer to pull back the tempo suddenly for a brief, dramatic effect, before likely returning to the original speed.
Distinguishing Gradual vs. Abrupt Change: An accelerando over four measures creates a smooth, gradual build-up of energy. In contrast, a sudden shift from Adagio to Presto at a new section creates an abrupt, dramatic change in character that clearly delineates the musical form.
Common Misconceptions & Clarifications
Tempo vs. Rhythm: Tempo is the speed of the underlying beat. Rhythm refers to the patterns of long and short note durations that are placed on top of that beat. A piece with a fast tempo can still contain very long notes.
Ritardando vs. Ritenuto: These terms both mean to slow down, but their application is different. Ritardando is a gradual process, like a car slowly braking for a stop sign. Ritenuto is more sudden and localized, like briefly tapping the brakes to avoid a hazard.
Tempo Markings are also Mood Markings: Italian terms like Allegro (fast, cheerful), Adagio (slow, at ease), and Largo (very slow, broad) describe a character or mood, not just a number. A performer's interpretation should reflect this mood in addition to the speed.
Metronome Markings as Absolute: While a metronome marking provides a precise target, skilled performers often employ subtle, unwritten fluctuations of tempo (known as rubato) for expressive purposes. The marking is a starting point, not a rigid command.
Summary
Tempo is the speed at which music is performed, governed by the rate of its underlying beat pulse. This essential element is communicated through a system of Italian terms—such as Largo, Moderato, and Allegro—or through precise metronome markings that indicate beats per minute. Beyond establishing a baseline speed, composers use tempo as a critical expressive and structural device. Markings that adjust the tempo, such as the gradual accelerando (speeding up) and ritardando (slowing down) or the more abrupt ritenuto (suddenly slower), allow composers to shape phrases, build or release tension, and provide clear signals for formal divisions and cadences. A thorough understanding of these terms is crucial for both the analysis of notated music and the interpretation of performed music.