Trumpet and cornet, alto and alto.

The problem you mentioned is more complicated. We can briefly introduce trumpet and cornet as a group, tenor and alto as a group, namely:

The common range of trumpet and cornet is basically the same, and the best range is from C in a small group to G in a small group. The difference is that the trumpet is thin and long, the trumpet mouth is shallow and flat, the pronunciation is bright and loud, and the dynamic conversion ability is strong. It is the most pronounced and flexible instrument in brass instruments. Trumpet is one of the indispensable and important melody instruments in the wind band. Trumpet pronunciation is soft and smooth, and it is more convenient and easier to master than trumpet in playing skills. It is also a high-pitched melody instrument, which is more suitable for playing songs and other melodies. In addition, there are two kinds of trumpet in B-flat and A-flat.

The tenor's range is eight octaves lower than that of the trumpet, and its sound quality is round, beautiful and bright, and its dynamic range is also very large, from extremely weak to extremely strong. It is a melody instrument in the alto department and occupies an important position in the band; The length of the upper and lower woofers is equal to that of the tenor, and the common range is almost the same as that of the tenor, but the sound basin is thick and long. Therefore, its timbre is wide and thick, tenor and bass are very pleasing to the ear, so it is often played as a melody instrument in bands.

By comparison, if alto and mezzo-alto are regarded as tenors and baritones in chorus, then trumpet and cornet can also be regarded as sopranos and mezzo-sopranos in chorus.