# How do I insert COMPOSER's last name into filename?
**URL:** https://community.mp3tag.de/t/how-do-i-insert-composers-last-name-into-filename/7829
**Category:** Support
**Created:** [January 23, 2009, 12:32pm UTC](https://community.mp3tag.de/t/how-do-i-insert-composers-last-name-into-filename/7829 "2009-01-23T12:32:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@losinj](https://community.mp3tag.de/u/losinj)
#### Post date: [January 23, 2009, 12:32pm UTC](https://community.mp3tag.de/t/how-do-i-insert-composers-last-name-into-filename/7829/1 "2009-01-23T12:32:25Z")
Hi,
I have filenames like:
08 Carillon de Longpont.flac
and
1-08 Carillon de Longpont.flac
but need them to be like:
08 Vierne - Carillon de Longpont.flac
and
1-08 Vierne - Carillon de Longpont.flac
where the COMPOSER tag is "Louis Vierne". Composers can also be like "Nicolas Jaques Lemmens", so it's always the last name that I would like inserted.
Is there an elegant way to accomplish this, e.g. with Replace, please?
---
### Author:  [@losinj](https://community.mp3tag.de/u/losinj)
#### Post date: [January 23, 2009, 5:30pm UTC](https://community.mp3tag.de/t/how-do-i-insert-composers-last-name-into-filename/7829/2 "2009-01-23T17:30:58Z")
Managed to kludge this with an Action Group and a temporary tag. I'm very much a novice so there are no doubt neater ways but this seems to work with the above formats although not extensively tested.
**Put composer and filename into temporary tag**
Action type: Format value
Field: DUMMY
Format string: %composer% %\_filename\_ext%
Result: Louis Vierne 1-08 Carillon de Longpont.flac
**Discard composer first name(s)**
Action type: Replace with regular expression
Field: DUMMY
Regular expression: (._)\s(.+\s(\d-)?\d{2}\s._)
Replace matches with: $2
Case-sensitive comparison: []
Result: Vierne 1-08 Carillon de Longpont.flac
**Swap positions of composer last name and disc-track number, adding hyphen**
Action type: Replace with regular expression
Field: DUMMY
Regular expression: (.\*)\s((\d-)?\d{2})\s(.+)
Replace matches with: $2 $1 - $4
Case-sensitive comparison: []
Result: 1-08 Vierne - Carillon de Longpont.flac
**Update filename from dummy tag**
Action type: Format value
Field: \_FILENAME
Format string: %dummy%
**Clean up**
Action type: Remove fields
Fields to remove: DUMMY
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:21pm UTC](https://community.mp3tag.de/t/how-do-i-insert-composers-last-name-into-filename/7829/3 "2026-02-09T12:21:20Z")