# Numbering several tracks from different albums in a row
**URL:** https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670
**Category:** Support
**Created:** [August 16, 2006, 10:58am UTC](https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670 "2006-08-16T10:58:18Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Harakiri](https://community.mp3tag.de/u/Harakiri)
#### Post date: [August 16, 2006, 10:58am UTC](https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670/1 "2006-08-16T10:58:18Z")
Hi there!
First of all i want to congratulate you all for the amazing Application and Respective Community that you are developing!
My problem is the following:
I have a folder wich contains several files from different albums renamed in this fashion:
1 - Artist - Title.mp3
4 - Title.mp3
2 - Whatever.mp3
And i want to convert all this files to the following fashion:
01 - Artist - Title.mp3
04 - Title.mp3
02 - Whatever.mp3
Is this possible? Can i create a action to this or some regular expression?
I'm sorry if this explanation is incoherent, i can't explain it better so i hope you understand... 🙂
Thanks in advance!
Regards,
Pedro Vieira
**Moderation:** Removed excessive use of empty lines.
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### Author:  [@Sebastian\_Mares](https://community.mp3tag.de/u/Sebastian_Mares)
#### Post date: [August 17, 2006, 6:30am UTC](https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670/2 "2006-08-17T06:30:13Z")
Action #1:
_Action type:_ **Replace with regular expression**
_Field:_ **\_FILENAME**
_Regular expression:_ **^(\d - )**
_Replace matches with:_ **0$1**
[] case-sensitive comparison
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### Author:  [@Harakiri](https://community.mp3tag.de/u/Harakiri)
#### Post date: [August 18, 2006, 6:27pm UTC](https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670/3 "2006-08-18T18:27:57Z")
Thank you very much i guess that will do fine!
Is there some topic where i can learn more about syntax in regular expressions? The existent ones seem kinda vague...
I noticed that the program lacks the Portuguese (Portugal) translation, i can do it for you if you want to, just tell me what do i need to fill!
Take care! 🙂
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:19pm UTC](https://community.mp3tag.de/t/numbering-several-tracks-from-different-albums-in-a-row/3670/4 "2026-02-09T12:19:51Z")