Especially with the brass instruments, louder levels produce a brighter sound. strings, woodwinds, brass, organ, wind machine). With Garritan Personal Orchestra 5, the mod wheel simultaneously controls both volume and timbre for sustaining instruments (e.g. Normally, this controller is mounted on the left side of the keyboard and is played with the left hand. Dynamics and expression in Garritan Personal Orchestra 5 are achieved through the mod wheel. Without dynamics, music lacks depth of expression. Every phrase and note has unwritten dynamics and nuances that players interpret. One thing that makes an orchestra sound great is dynamic contrast.