Changes to the default content type mapping to accommodate music
The current default MARC field mapping for web resources and computer files includes an option for MARC field 008(026). For most content types, this field position indicates that the resource has online content or is accessed electronically.
HOWEVER
Music scores and sound recordings have a different set of values for the 008 field. Their data elements for the 008(26) position indicate that the resource has accompanying matter, such as historical information, biographical content, or a discography.
By having the 008(26) as a default MARC mapping for all types, many music resources will get incorrectly identified as web resources or computer files.
TL;DR: do not include the 008(26) as a default MARC field mapping option in any content type.