# Track numbers
**URL:** https://community.mp3tag.de/t/track-numbers/10473
**Category:** Support
**Created:** [May 26, 2010, 5:31am UTC](https://community.mp3tag.de/t/track-numbers/10473 "2010-05-26T05:31:32Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@xbon](https://community.mp3tag.de/u/xbon)
#### Post date: [May 26, 2010, 5:31am UTC](https://community.mp3tag.de/t/track-numbers/10473/1 "2010-05-26T05:31:32Z")
I have a lot of folders where the track number is 01, 02,03,04
I would prefer them be 1,2,3,4 No leading 0 etc
I know i can use the auto numbering wizard to renumber, however sometimes the cdmp3`s in the cd folder dont always appear in the correct order so you could have
track
0
3
1
2
5
4
etc instead of 0,1,2,3,4,5
Is there a way of just removing the leading 0
---
### Author:  [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [May 26, 2010, 6:01am UTC](https://community.mp3tag.de/t/track-numbers/10473/2 "2010-05-26T06:01:51Z")
Make a [new action](https://community.mp3tag.de/t/967/1)
_Action type:_ **Format value**
_Field:_ **TRACK**
_Formatstring:_ **[$num(%track%,1)]**
---
### Author:  [@auldyin](https://community.mp3tag.de/u/auldyin)
#### Post date: [May 26, 2010, 7:51am UTC](https://community.mp3tag.de/t/track-numbers/10473/3 "2010-05-26T07:51:14Z")
Sorry to hi-jack this thread and apologies if this is a "silly" question......................I have a mixture of MP3, MP4 and M4A files some of which are numbered 1,2,3 etc and others 01,02,03.
Why is this?
---
### Author:  [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [May 26, 2010, 8:47am UTC](https://community.mp3tag.de/t/track-numbers/10473/4 "2010-05-26T08:47:36Z")
mp4/m4a don't support leading zeros in their track tags.
---
### Author:  [@mjcm](https://community.mp3tag.de/u/mjcm)
#### Post date: [May 26, 2010, 8:47am UTC](https://community.mp3tag.de/t/track-numbers/10473/5 "2010-05-26T08:47:56Z")
> [@auldyin](#):
>
> I have a mixture of MP3, MP4 and M4A files some of which are numbered 1,2,3 etc and others 01,02,03.
> Why is this?
[TAGs: iTunes M4a vs MP3](https://community.mp3tag.de/t/2556/12)
"This is because the standard MP4 tag atom (TRKN) can't store leading zeros.
And also FYI in m4a tags the track number and the total amount of tracks are
mapped to two different fields. TRACK and TOTALTRACKS
You can see it in the extended tag view [Alt+t].
---
### Author:  [@auldyin](https://community.mp3tag.de/u/auldyin)
#### Post date: [May 26, 2010, 10:20am UTC](https://community.mp3tag.de/t/track-numbers/10473/6 "2010-05-26T10:20:58Z")
> [@Mike\_nl](#):
>
> [TAGs: iTunes M4a vs MP3](https://community.mp3tag.de/t/2556/12)
>
> "This is because the standard MP4 tag atom (TRKN) can't store leading zeros.
> And also FYI in m4a tags the track number and the total amount of tracks are
> mapped to two different fields. TRACK and TOTALTRACKS
>
> You can see it in the extended tag view [Alt+t].
Perfectly clear. Thanks
> [@](#):
>
> Make a new action
>
> Action type: Format value
> Field: TRACK
> Formatstring: [$num(%track%,1)]
And presumably this will remove the leading zeros from MP3 files.
Cheers
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:22pm UTC](https://community.mp3tag.de/t/track-numbers/10473/7 "2026-02-09T12:22:25Z")