txtDefinition=The art of arranging {\uldb themes}{\v 99088} and {\uldb harmonies}{\v 84040} in the most effective manner. This covers everything from the assigning of themes and {\uldb voices}{\v 105907} to specific {\uldb instruments}{\v 84565}, the spacing of {\uldb chords}{\v 76801}, and the {\uldb inversions}{\v 106856} and {\uldb registers}{\v 93789} in which they appear. Because the forces in a {\uldb string quartet}{\v 154839} are quite limited, the composer must compensate with a highly refined sense of scoring; in {\uldb K.}{\v 137211} 465, Mozart responded to this challenge with a vengeance.