041 Subfield $d - Language code of sung or spoken text:

Subfield $d contains the language code(s) for the audible portion of an item, usually the sung or spoken content of a sound recording or computer file. Note: The language code(s) for the textual portion of an item is entered in subfield $a .

Example:

008/35-37 eng

041 0#$deng$eengfreger

[Recording in English with accompanying libretto in English, French, and German.]