The triangle is a Musical instrument Idiophone consisted of a metal bar of circular section folded in two points so as to form a more or less regular Triangle. It is held with a hand by the musician, who strikes above using a stem, also metal.
Its crystalline and acute sonority enables him to be perceptible even when he is played in a Orchestre, bringing a rhythmic part structuring the piece carried out.
The dimension of a triangle determines the height of the sound which it produces (directly proportional to the length of the metal stem used). The small triangles make a score of centimetres on side, largest can go up to 30 or 40 centimetres on side. To reduce the mass of the instrument and the tiredness of the musician, the triangle can be made of Aluminum rather than of Acier; but one also finds triangles made of simple a Fer with Béton of recovery.
The musician holds the triangle of a hand (its hand known as weak , is the left for the droitiers and the line for the left-handed ): the weight of the instrument is carried by the index, the remainder of the hand being used to choke the resonance of metal while being closed again on one of its edges. Other hand, it comes to strike in rate/rhythm the lower bar, on the level of the angle of bottom more far from him. The movement of the rod makes it possible alternatively to strike this lower bar and the most distant bar, since the rod is partly committed in the opening of the triangle.
The musical forms in which the triangle is generally used are:
Simple: Triangle (instrument)
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