The glass marimba is a type of idiophone also known as a vitrephone or crystallophone. Marimba translates to "a xylophone-like instrument" from an African language, probably

Bantu Bantu may refer to: *Bantu languages, constitute the largest sub-branch of the Niger–Congo languages *Bantu peoples, over 400 peoples of Africa speaking a Bantu language *Bantu knots, a type of African hairstyle *Black Association for Nationali ...

. The

glass Glass is a non-Crystallinity, crystalline, often transparency and translucency, transparent, amorphous solid that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most ...

keys are made of either hard glass ( plate glass) or soft glass ( stained glass). The keys are resonated with either a single open top box or individual resonators for each key. Mallets used to play the marimba can be constructed using a compressed silicone ball ( bouncy ball) attached to one end of a wooden or synthetic dowel. These mallets bring out the purest sound from glass marimba. Other types of mallets are used for different effects. The tuning system of a glass marimba can be whatever is desired. Glass marimbas are utilised by the

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

ian percussion ensemble, Uakti.

Construction

Glass marimba can be constructed in a variety of ways. How one resonates the keys governs the construction method and design. Resonation can be accomplished using a single resonator which all the keys resonate into, such as an open top box, or individual resonators for each key which can be a tube, box, or sphere. Single box resonators can be constructed from

wood Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulose fibers that are strong in tension and embedded in a matrix of ligni ...

, or

metal A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typi ...

among a variety of materials. Individual resonators can be made from gourds, wood,

bamboo Bamboos are a diverse group of evergreen perennial flowering plants making up the subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family. The origin of the word "bamboo" is uncertain, ...

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay part ...

, glass, pvc, or metal, to name a few. The keys also govern the design of the marimba due to the fact that the keys are supported at points called nodes and these dictate the shape of the marimba due to the graduated lengths of the keys and how one supports them. Also, the width of the keys, which can be graduated, determines the overall length. Keys can be made from plate glass or stained glass. With stained glass, two pieces must be fused together in a

kiln A kiln is a thermally insulated chamber, a type of oven, that produces temperatures sufficient to complete some process, such as hardening, drying, or chemical changes. Kilns have been used for millennia to turn objects made from clay int ...

to obtain the necessary thickness of 1/4" for the most common glass marimba tunings, though thinner and thicker keys can be used for low and high tunings. Tuning is accomplished most commonly by removing glass from the end of the key which causes the note to go up. Removing glass from the bottom of the key will cause the note to go down but is only feasible if one is using opaque glass for the keys. The keys are best supported on a pad of open cell foam mounted to a thin piece of wood and encased in cloth. The keys are attached with double sided clear tape. Silicone glue is also used. An alternate method of attachment is to use posts between each key on one side and a single post going through a hole in the key on the other side.

References

Crystallophones Stick percussion idiophones Pitched percussion instruments {{Mallet-stub