# Help creating Action to get Composer in Filename **URL:** \ **Category:** Support\ **Created:** [August 24, 2013, 7:17pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990 "2013-08-24T19:17:11Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![sigrun](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/s/eb9ed0/32.png) [@sigrun](https://community.mp3tag.de/u/sigrun)\ **Post date:** [August 24, 2013, 7:17pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/1 "2013-08-24T19:17:11Z")
So I have the COMPOSER field filled like this: ``` Frédéric Chopin (1810–49) ``` And the TITLE field filled like this: ``` Polonaise #5 in F-sharp minor, op. 44 ``` How can I create an Action to make the FILENAME field be like this: ``` 01. CHOPIN_ Polonaise #5 in F-sharp minor, op. 44.mp3 ``` So that's TRACK. COMPOSER(surname & caps only)\_ TITLE.mp3 Thanks! ---
**Author:** ![garym](https://community.mp3tag.de/user_avatar/community.mp3tag.de/garym/32/4822_2.png) [@garym](https://community.mp3tag.de/u/garym)\ **Post date:** [August 24, 2013, 9:57pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/2 "2013-08-24T21:57:10Z")
use CONVERT \> tag to filename, with mask: $num(%track%,2). %composer%\_%title% But this will put the entire composer name and date in as composer. So you need a method to pull out just the part of the composer name you want. Perhaps someone else can help with that. Plus there is probably a way to tell mp3tag to make all those filename parts all caps, but I'll have to dig deeper for that as I haven't used that option. ---
**Author:** ![stevehero](https://community.mp3tag.de/user_avatar/community.mp3tag.de/stevehero/32/337_2.png) [@stevehero](https://community.mp3tag.de/u/stevehero)\ **Post date:** [August 24, 2013, 11:02pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/3 "2013-08-24T23:02:15Z")
> [@sigrun](#): > > So I have the COMPOSER field filled like this: > > ``` > Frédéric Chopin (1810–49) > > ``` > > And the TITLE field filled like this: > > ``` > Polonaise #5 in F-sharp minor, op. 44 > > ``` > > How can I create an Action to make the FILENAME field be like this: > > ``` > 01. CHOPIN_ Polonaise #5 in F-sharp minor, op. 44.mp3 > > ``` > > So that's TRACK. COMPOSER(surname & caps only)\_ TITLE.mp3 > > Thanks! **Action #1** _Actiontype 5:_ **Format value** _Field \_\_\_\_\_\_:_ **\_FILENAME** _Formatstring:_ **$num(%track%,2). $upper($regexp(%composer%,'^[^\s]+\s([^\s]+).\*',$1))\_%title%** ---
**Author:** ![sigrun](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/s/eb9ed0/32.png) [@sigrun](https://community.mp3tag.de/u/sigrun)\ **Post date:** [August 25, 2013, 9:28am UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/4 "2013-08-25T09:28:43Z")
stevehero, that works brilliantly, thanks! The only problem now is dealing with Composers with three names. So for example "Wolfgang Amadeus Mozart" comes out as "AMADEUS" using that action. I can create a simple rule for each of these to replace AMADEUS with MOZART, VAN with BEETHOVEN, etc.. But is it possible to build the original action, or add a new one, that would take the third name if there are three? Or take the first name to the left of the year brackets? Thanks again! ---
**Author:** ![stevehero](https://community.mp3tag.de/user_avatar/community.mp3tag.de/stevehero/32/337_2.png) [@stevehero](https://community.mp3tag.de/u/stevehero)\ **Post date:** [August 25, 2013, 11:00am UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/5 "2013-08-25T11:00:33Z")
The old action grabs the 2nd word whereas this will grab the last word before the _\_(YEAR.$_ \_ is space YEAR is 4 digit year . matches anything any number of times $ anchors the regexp to the end of the string. .+\s([^\s]+)\s+(\d\d\d\d.\*$ Begin Action Group **\_FIXED ACTION** **Action #1** _Actiontype 5:_ **Format value** _Field \_\_\_\_\_\_:_ **\_FILENAME** _Formatstring:_ **$num(%track%,2). $upper($regexp(%composer%,'.+\s([^\s]+)\s+\(\d\d\d\d.\*$,$1))\_%title%** End Action Group **\_FIXED ACTION** (1 Action) ---
**Author:** ![sigrun](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/s/eb9ed0/32.png) [@sigrun](https://community.mp3tag.de/u/sigrun)\ **Post date:** [August 25, 2013, 12:38pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/6 "2013-08-25T12:38:59Z")
I actually got a "Syntax Error" with that, but I compared it with the other one & put in a ' after the the second last $ **$num(%track%,2). $upper($regexp(%composer%,'.+\s([^\s]+)\s+(\d\d\d\d.\*$',$1))\_%title%** Not really sure what that does, but it seems to work now!! Thanks for your help! It's one hell of an Action! ---
**Author:** ![stevehero](https://community.mp3tag.de/user_avatar/community.mp3tag.de/stevehero/32/337_2.png) [@stevehero](https://community.mp3tag.de/u/stevehero)\ **Post date:** [August 25, 2013, 1:22pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/7 "2013-08-25T13:22:44Z")
Sometimes that happens when you paste the action into the forum.. It got rid of the $ before the '. Looks like I missed that. Glad you got found the solution. As regards the ' at the start and end of the **expr**. I tend to put that in all my **$regexp(x,expr,repl)** like **$regexp(x,'expr',repl)** and even **$regexp(x,'expr','repl')** when needs be. I can't find where it says that in the help but it's good to be aware of that. ---
**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\ **Post date:** [February 9, 2026, 12:24pm UTC](https://community.mp3tag.de/t/help-creating-action-to-get-composer-in-filename/14990/8 "2026-02-09T12:24:38Z")
Closed on February 9, 2026, 12:24pm UTC