Disc number Sequential Action

[ohrenkino]

See the FAQs:

Actions and batch-operations

How to append the string " xyz" to the content of a tag field? Create a new action in an existing action group and choose Format value as action type. Field specifies the tag field the formatting rule should be applied to. Format string must have the field placeholder for the field selected above and the string which should be appended. Example: If you want to append the string " xyz" to the current value of the comment field: Action type: Format value Field: COMMENT Format string: %com…

I would like to add that the field DISCNUMBER is a numeric field with exception of the slash.
Adding letters would break that and lead to possible irritations in players. IMHO it is the task of the player to supply a suitable label for a field.