Ocarina

Types

There are many different styles of ocarinas varying in shape and the number of holes:

• Transverse (Sweet potato) – This is the best-known style of ocarina. It has a rounded shape and is held with two hands horizontally. Depending on the number of holes, the player opens one more hole than the previous note to ascend in pitch. The two most common transverse ocarinas are 10-hole (invented by Giuseppe Donati in Italy) and 12-hole. They have a range of between an octave plus a fourth and an octave plus a minor sixth.
• Pendants:
  • English Pendant – These are usually very small and portable, and use the English fingering system devised by John Taylor (4–6 holes). This fingering system allows them to achieve a range of between an octave and an octave plus a major second.
  • Peruvian Pendant – Dating from the time of the Incas, used as instruments for festivals, rituals, and ceremonies. They are often seen with designs of animals. They usually have 8–9 holes.
• Inline – These ocarinas are usually rectangular or oval-shaped and are constructed so that the instrument points away from the musician when played. Most inline ocarinas have a similar or identical fingering system to transverse ocarinas.
• Multi-chambered ocarinas (usually called "double ocarina" or "triple ocarina" according to the number of chambers) – These are essentially separate ocarinas molded into one body, each chamber having its own mouthpiece and its own set of finger holes. This construction usually either expands the range of the instrument or allows multiple notes to be played at once. Although multi-chamber ocarinas can be made in transverse, inline, or pendant style, the transverse style is the most common. A typical transverse double ocarina plays two octaves plus a minor third, and a transverse triple ocarina usually plays with a range of about two octaves plus a minor seventh.
• Keys and slides – Beginning in the late 19th century, several makers have also produced ocarinas with keys and slides. These mechanisms either expand the instrument's range, help fingers reach holes that are widely spaced, or make it easier to play notes that are not in the native key of the instrument.

Musical performance

Tone production and acoustics

How an ocarina works:

1. Air enters through the windway
2. Air strikes the labium, producing sound
3. Air pulses in and out of the ocarina, as the vessel resonates a specific pitch (see Helmholtz resonator)
4. Covering holes lowers the pitch; uncovering holes raises the pitch
5. Blowing more softly lowers the pitch; blowing harder raises it. Breath force can change the pitch by several semitones, of which about a third of a semitone either way is useful. Using too much or too little air will create an unpleasant tone. The fact that small changes to the flow of air will change the tuning (rather than the loudness) is why ocarinas generally have no tuning mechanism or dynamic range, and why it is hard to learn to play one in tune.

The airstream is directed toward the labium by a fipple or internal duct, which is a narrowing rectangular slot in the mouthpiece, rather than relying on the player's lips to aim the airstream as in a transverse flute. Like other flutes, the airstream alternates quickly between the inner and outer face of the labium as the pressure in the ocarina chamber oscillates.

At first, the sound is a broad-spectrum "noise" (i.e. "chiff"), but those frequencies that are identical with the fundamental frequency of the resonating chamber (which depends on the fingering), are selectively amplified. A Helmholtz resonating chamber is unusually selective in amplifying a single frequency. Most resonators also amplify more overtones. As a result, ocarinas and other vessel flutes have a distinctive overtoneless sound.

Unlike many flutes, ocarinas do not rely on pipe length to produce a particular tone. Instead, the tone is dependent on the ratio of the total surface area of opened holes to the total cubic volume enclosed by the instrument. This means that, unlike a transverse flute or recorder, sound is created by resonance of the entire cavity and the placement of the holes on an ocarina is largely irrelevant – their size is the most important factor. Instruments that have toneholes close to the voicing/embouchure should be avoided, however; as an ocarina is a Helmholtz resonator, this weakens tonal production.

The resonator in the ocarina can create overtones, but because of the common "egg" shape, these overtones are many octaves above the keynote scale. In similar Helmholtz resonator instruments with a narrow cone shape, like the Gemshorn or Tonette, some partial overtones are available. The technique of overblowing to get a range of higher-pitched notes is possible with the ocarina but not widely used because the resulting note is not "clean" enough, so the range of pitches available is limited by the total area of the holes.

Some ocarina makers bypass these physical limitations by creating ocarinas that have two or three resonating chambers, each with their own windway and labium. There are two main systems that dictate how these additional chambers are tuned: the Asian system and the Pacchioni system. The Asian system maximizes range by beginning each chamber one semitone higher than the highest note of the previous chamber. The Pacchioni system instead focuses on smoothing the transition between chambers by overlapping their ranges slightly, thereby making it easier to play melodies that fall in that range.

Musical notation and tablature

Ocarina music is written in three main ways. The most apparent is the use of sheet music. There are archives of sheet music either specifically written for ocarinas, or adapted from piano sheet music. Since some ocarinas are fully chromatic and can be played in professional musical situations, including classical and folk, sheet music is an ideal notation for ocarinas.

Second is the use of numerical tablature, which expresses the musical notes as numbers. Some makers have developed their own system of numerical tablature for their ocarinas, while others follow a more universal system where numbers correspond to different notes on the scale. This method is typically used by beginners who have not learned to read sheet music.

A third method uses a pictorial tablature similar to the ocarina's finger hole pattern, with blackened holes that represent holes to cover. The tablature represents the holes on the top of the ocarina, and, where necessary, the holes on the underside. This enables easy playing, particularly for beginners. The two most popular tablature systems are:

• The John Taylor four-hole system (invented in 1964 by British mathematician John Taylor)
• The 10 hole sweet potato system (invented by Giuseppe Donati of Budrio Italy)

Depending on the artist, some may write a number or figure over the picture to depict how many beats to hold the note.

Articulation

Due to its lack of keys, the ocarina shares many articulations with the tin whistle, such as cuts, strikes, rolls, and slides. However, tonguing is used more often on ocarina than on tin whistle, and vibrato is always achieved through adjusting breath pressure instead of with the fingers.

Similar instruments

Other vessel flutes include the Chinese xun and African globe flutes. The xun (simplified Chinese: 埙; traditional: 塤; pinyin: xūn) is a Chinese vessel flute made of clay or ceramic. It is one of the oldest Chinese instruments. Shaped like an egg, it differs from the ocarina in being side-blown, like the Western concert flute, rather than having a recorder-like mouthpiece (a fipple or beak). Similar instruments exist in Korea (the hun) and Japan (the tsuchibue).

A related family of instruments is the closed-pipe family, which includes the panpipes and other instruments that produce their tone by vibrating a column of air within a stopped cylinder.

The old fashioned jug band jug also has similar properties.

The traditional German gemshorn works nearly the same way as an ocarina. The only difference is the material it is made from: the horn of a chamois, goat, or other suitable animal.

The borrindo is a simple hollow clay ball with three to four fingering holes, one hole slightly larger than the other three, which are smaller and of equal size to one another. The holes are arranged in an isosceles triangular form. The borrindo is made out of soft alluvial clay available in plenty everywhere in the central Indus Valley. Being of the simplest design, it is made even by children. Some adults make fine borrindos of larger size, put pottery designs on them, and bake them. These baked borrindos, with pottery designs, are the later evolved forms of this musical instrument, which appears to have previously been used in its simple unbaked form for a long time. The sound notes are produced by blowing somewhat horizontally into the larger hole. Finger tips are placed on smaller holes to regulate the notes. Its ease of play makes it popular among children and the youth.