048 Subfield $a - Performer or ensemble:

Subfield $a contains a two-character alphabetic code for a performer or ensemble (See: Instruments or Voices Codes ) and, if applicable, a two-digit number (01-99) specifying the number of parts.

Examples:

048 ##$aka01$asa01$asc01

[Piano trio.]

048 ##$bvi01$aka01

[For medium voice and piano.]

048 ##$aka01

048 ##$akb01

[For piano or organ.]

048 ##$boe01$aoa

[Concerto for dance band with orchestra.]