Singer
Person who uses his or her voice with or without musical accompaniment to produce music. Also applies to groups of persons (choruses, ensembles). A singer's performance may or may not include actual words.
Use when a more specific value is not required.
In lieu of 721, specific values can be used based on the type of voice/ensemble. These values are the same as those defined for field 145 $b-$d, pos. 2-4.
