It is a group of people singing in choirs without any instrumental accompanist, being a vocal group that interprets pieces of a vocal musical nature that is; that the only thing that interprets the piece is the voice composed of several voices which give the chorus a nuance and tonalities, they are vocal registers or tessitura in different vocal registers called note intervals. In this sense there is a variety of vocal cords, the sopranos is a higher register of a woman or a child, they are registered vocally in the notes C / 4 and / 5 and it is always the main voice of the piece.
The mezzo-sopranos is a very rare voice, since very few have it, it is rare and unusual in mixed corals, it is recognized among solo female corals since it is a type of voice with a medium register, this condition places the interpreter among the records of the soprano and contralto. The contralto is a deep voice that is very difficult to find since very few people in the singing world have it; since it is a single register that is located in the notes fa / 3 or usually lower than the notes re / 5. Or sopranista countertenor voice is more acutein men, a combination of the notes re / 5 and can reach the note la / 5 almost reaching the vocal register of the mezzo-sopranos. The tenor is the highest voice in men that would be the highest without the participation of the countertenors, which gives soft melodies between the vowel notes B / 2 and G / 4. The baritones in turn is the most common voice in men with a vocal register that goes between the low notes and the tenors, but keeping in the low registers and mixing with the voices of the other choristers, having a vocal register between the sun notes. / 5 and my / 4. The bass is a simple and serious voice that remains in its vocal register are the counterweight of the other voices and its vocal register is between the vocal notes mi / 2 and d / 4
