Alberti was born in Venice and studied music with Antonio Lotti. He wrote operas, songs, and sonatas for keyboard instruments, for which he is best known today. These sonatas frequently employ a particular kind of arpeggiated accompaniment in the left hand that is now known as the Alberti bass. It consists of regular broken chords, with the lowest note sounding first, then the highest, then the middle and then the highest again. This pattern is repeated. Today, Alberti is regarded as a minor composer, and his works are played or recorded only irregularly. The Alberti bass was used by many later composers, and it became an important element in much keyboard music of the Classical music era.
In his own lifetime, Alberti was known as a singer. He often used to accompany himself on the harpsichord. In 1736, he served as a page for Pietro Andrea Cappello, the Venetian ambassador to Spain. While at the Spanish court, the famous castrato singer Farinelli heard him sing. Farinelli was said to have been impressed, although Alberti was an amateur.
Alberti's best known pieces are his keyboard sonatas, although even they are very rarely performed. It is thought he wrote around 36 sonatas, of which 14 have survived. They all have two movements, each in binary form.
Alberti died in 1740 in Rome.
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