Vocal range in the context of Voice change

A barbershop quartet is a group of four singers who sing music in the barbershop style, characterized by four-part harmony without instrumental accompaniment (a cappella). The four voices are: the lead, the vocal part which typically carries the melody; a bass, the part which provides the bass line to the melody; a tenor, the part which harmonizes above the lead; and a baritone, the part that frequently completes the chord. The baritone normally sings just below the lead singer, sometimes just above as the harmony requires. Barbershop music is typified by close harmony—the upper three voices generally remain within one octave of each other.

While the traditional barbershop quartet included only male singers, contemporary quartets can include any gender combination. All-female barbershop quartets were often called beauty shop quartets, a term that has fallen out of favor. The voice parts for women's and mixed barbershop groups use the same names as those for male groups since the roles perform similar functions in the quartet although the vocal ranges may be different.

A soprano (Italian pronunciation: [soˈpraːno]) is a type of classical singing voice and has the highest vocal range of all voice types. The soprano's vocal range (using scientific pitch notation) is from approximately middle C (C₄) = 261 Hz to A₅ in choral music, or to soprano C (C₆) or higher in operatic music. In four-part chorale style harmony, the soprano takes the highest part, which often encompasses the melody. The soprano voice type is generally divided into the coloratura, soubrette, lyric, spinto, and dramatic soprano.

A castrato (Italian; pl.: castrati) is a male singer who underwent castration before puberty in order to retain a singing voice equivalent to that of a soprano, mezzo-soprano, or contralto. The voice can also occur in one who, due to an endocrinological condition, never reaches sexual maturity.

Castration before puberty (or in its early stages) prevents the larynx from being transformed by the normal physiological events of puberty. As a result, the vocal range of prepubescence (shared by both sexes) is largely retained, and the voice develops into adulthood in a unique way. Prepubescent castration for this purpose diminished greatly in the late 18th century.

A bass is a type of classical male singing voice and has the lowest vocal range of all voice types. According to The New Grove Dictionary of Opera, a bass is typically classified as having a vocal range extending from around the second E below middle C to the E above middle C (i.e., E₂–E₄). Its tessitura, or comfortable range, is normally defined by the outermost lines of the bass clef. Categories of bass voices vary according to national style and classification system.

Italians favour subdividing basses into the basso cantante (singing bass), basso buffo (comical bass), or the dramatic basso profondo (deep bass). The American system identifies the bass-baritone, comic bass, lyric bass, and dramatic bass.

The tenor is a type of male singing voice whose vocal range lies between the countertenor and baritone voice types. It is the highest male chest-voice type. Composers typically write music for the tenor in the range from the second B below middle C, to the G above middle C (i.e. B₂ to G₄) in choral music – and from the second B-flat below middle C, to the C above middle C (B♭₂ to C₅) in operatic music – but the range can extend at either end. Subtypes of the tenor include the leggero tenor, lyric tenor, spinto tenor, dramatic tenor, heldentenor and tenor buffo (also known as the spieltenor).

A baritone is a type of classical male singing voice whose vocal range lies between the bass and the tenor voice-types. It is the most common male voice. The term originates from the Greek βαρύτονος (barýtonos), meaning "low sounding". Composers typically write music for this voice in the range from the second F below middle C to the F above middle C (i.e. F₂–F₄) in choral music, and from the second G below middle C to the G above middle C (G₂ to G₄) in operatic music, but the range can extend at either end. Subtypes of baritone include the baryton-Martin baritone (light baritone), lyric baritone, Kavalierbariton, Verdi baritone, dramatic baritone, baryton-noble baritone, and the bass-baritone.

In music, the range, or chromatic range, of a musical instrument is the distance from the lowest to the highest pitch it can play. For a singing voice, the equivalent is vocal range. The range of a musical part is the distance between its lowest and highest note.

A voice type is a classification of the human singing voice into perceivable categories or groups. Particular human singing voices are identified as having certain qualities or characteristics of vocal range, vocal weight, tessitura, vocal timbre, and vocal transition points (passaggio), such as breaks and lifts within the voice. Other considerations are physical characteristics, speech level, scientific testing, and vocal register. A singer's voice type is identified by a process known as voice classification, by which the human voice is evaluated and thereby designated into a particular voice type. The discipline of voice classification developed within European classical music and is not generally applicable to other forms of singing. Voice classification is often used within opera to associate possible roles with potential voices. Several different voice classification systems are available to identify voice types, including the German Fach system and the choral music system among many others; no system is universally applied or accepted.

Voice classification is a tool for singers, composers, venues, and listeners to categorize vocal properties and to associate roles with voices. While useful, voice classification systems have been used too rigidly, i.e. a house assigning a singer to a specific type and only casting him or her in roles they consider belonging to this category.While choral singers are classified into voice parts based on their vocal range, solo singers are classified into voice types based more on their tessitura – where their voice feels most comfortable for the majority of the time.

A coloratura soprano (Italian: soprano di coloratura) is a type of operatic soprano voice that specializes in music that is distinguished by agile runs, leaps and trills.

The term coloratura refers to the elaborate ornamentation of a melody, which is a typical component of the music written for this voice. Within the coloratura category, there are roles written specifically for lighter voices known as lyric coloraturas and others for larger voices known as dramatic coloraturas. Categories within a certain vocal range are determined by the size, weight and color of the voice. Coloratura is particularly found in vocal music and especially in operatic singing of the 18th and 19th centuries.

A lyric soprano is a type of operatic soprano voice that has a warm quality with a bright, full timbre that can be heard over an orchestra. The lyric soprano voice generally has a higher tessitura than a soubrette and usually plays ingenues and other sympathetic characters in opera. Lyric sopranos have a range from approximately middle C (C₄) to "high D" (D₆). This is the most common female singing voice. There is a tendency to divide lyric sopranos into two groups: light and full.

A dramatic soprano is a type of operatic soprano with a powerful, rich, emotive voice that can sing over, or cut through, a full orchestra. Thicker vocal folds in dramatic voices usually (but not always) mean less agility than lighter voices but a sustained, fuller sound. Usually this voice has a lower tessitura than other sopranos, and a darker timbre. They are often used for heroic, often long-suffering, tragic women of opera. Dramatic sopranos have a range from approximately low A (A₃) to "high C" (C₆). Some dramatic sopranos, known as Wagnerian sopranos or High dramatic sopranos (high in this case referring to the maturity of the voice, rather than the tessitura or range), have an exceptionally big voice that can assert itself over a large orchestra (of more than 80 or even 100 players). These voices are substantial, often denser in tone, extremely powerful and, ideally, evenly balanced throughout the vocal registers. Wagnerian sopranos usually play mythic heroines. Successful Wagnerian sopranos are rare and often Wagnerian roles are performed by Italianate dramatic sopranos.

The musical term alto, meaning "high" in Italian (from Latin: altus), historically refers to the contrapuntal part higher than the tenor and its associated vocal range. In four-part voice leading alto is the second-highest part, sung in choruses by either low women's or high men's voices. In vocal classification these are usually called contralto and male alto or countertenor.

A mezzo-soprano (Italian: [ˌmɛddzosoˈpraːno], lit. 'half soprano'), or mezzo (English: /ˈmɛtsoʊ/ MET-soh), is a type of classical female singing voice whose vocal range lies between the soprano and the contralto voice types. The mezzo-soprano's vocal range usually extends from the A below middle C to the A two octaves above (i.e. A₃–A₅ in scientific pitch notation, where middle C = C₄; 220–880 Hz). In the lower and upper extremes, some mezzo-sopranos may extend down to the F below middle C (F₃, 175 Hz) and as high as "high C" (C₆, 1047 Hz).The mezzo-soprano voice type is generally divided into coloratura, lyric, and dramatic.

A contralto (Italian pronunciation: [konˈtralto]) is a classical female singing voice whose vocal range is the lowest of their voice types.

The contralto voice type is fairly rare. A contralto's range is similar to that of a mezzo-soprano, and almost identical to that of a countertenor – typically from the F below middle C (F₃ in scientific pitch notation) to the second F above middle C (F₅), although, at the extremes, some voices can reach the D below middle C (D₃) or the second B♭ above middle C (B♭₅). The contralto voice type includes coloratura, lyric, and dramatic contraltos.

In music, tessitura (English: /ˌtɛsɪˈtʊərə/ TESS-ih-TOOR-ə, UK also /-ˈtjʊər-/ -⁠TURE-, Italian: [tessiˈtuːra]; pl. tessiture; lit. 'weaving' or 'texture') is the most acceptable and comfortable vocal range for a given singer (or, less frequently, musical instrument). It is the range in which a given type of voice presents its best-sounding (or characteristic) timbre. This broad definition is often interpreted to refer specifically to the pitch range that most frequently occurs within a given part of a musical piece. Hence, in musical notation, tessitura is the ambitus, or a narrower part of it, in which that particular vocal (or less often instrumental) part lies—whether high or low, etc.

However, the tessitura of a part or voice is not decided by the extremes of its range, but rather by the share of this total range which is most used. Hence, it is referred to as the "heart" of a range. For example, throughout the entirety of Wagner's Ring, the music written for the tenor role of Siegfried ranges from C♯₃ to C₅, but the tessitura is described as high because the phrases are most often in the range of C₄ to A₄.