048 Subfield $b - Soloist:

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

Example:

048 ##$bva02$bvc01$bvd01$bvf02$aca04$aoc

[Soloists (SSATBB), Chorus (SATB) and string orchestra.]