# \[X\] Track number in .m4a

**URL:** https://community.mp3tag.de/t/x-track-number-in-m4a/9376
**Category:** No Bugs
**Created:** [November 20, 2009, 2:43am UTC](https://community.mp3tag.de/t/x-track-number-in-m4a/9376 "2009-11-20T02:43:29Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![ximitao](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/x/db5fbb/32.png) [@ximitao](https://community.mp3tag.de/u/ximitao)
#### Post date: [November 20, 2009, 2:43am UTC](https://community.mp3tag.de/t/x-track-number-in-m4a/9376/1 "2009-11-20T02:43:29Z")

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I use to put a zero (0) before single digits (0~9) in my tags when numbering the tracks.  
I can't do that when in .m4a files.  
Tested in 2.44h

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### Author: ![dano](https://community.mp3tag.de/user_avatar/community.mp3tag.de/dano/32/6_2.png) [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [November 20, 2009, 5:35am UTC](https://community.mp3tag.de/t/x-track-number-in-m4a/9376/2 "2009-11-20T05:35:37Z")

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It's not supported by the apple tag standard.

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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 28, 2018, 2:27pm UTC](https://community.mp3tag.de/t/x-track-number-in-m4a/9376/3 "2018-12-28T14:27:57Z")

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