Auld Lang Syne is played by a variety of musical instruments, specifically strings, woodwinds, brass and percussion instruments.
The song "Auld Lang Syne" itself is not broken down into several parts, but the performance version may be different. For example, common performance versions may include pure music version, vocal chorus version, and symphony orchestra version. Performance version etc.
The pure music version is usually played simultaneously by strings, woodwinds, brass and percussion instruments. Strings mainly play the melody part, woodwinds and brass play the harmony part, and percussion plays the rhythm part.
The vocal chorus version usually has the human voice as the melody part, and strings, woodwinds, brass, percussion and other instruments simultaneously play the harmony part.
The symphony orchestra version is usually performed by a string section, woodwind section, brass section, percussion section, etc.
In general, the song "Auld Lang Syne" is not divided into several parts. Different performance versions will have different instrument combinations and playing methods.