# Leading Zero in Track Numbers For mp4

**URL:** https://community.mp3tag.de/t/leading-zero-in-track-numbers-for-mp4/8260
**Category:** Support
**Created:** [April 19, 2009, 1:16am UTC](https://community.mp3tag.de/t/leading-zero-in-track-numbers-for-mp4/8260 "2009-04-19T01:16:59Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![eric79new](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/e/94ad74/32.png) [@eric79new](https://community.mp3tag.de/u/eric79new)
#### Post date: [April 19, 2009, 1:16am UTC](https://community.mp3tag.de/t/leading-zero-in-track-numbers-for-mp4/8260/1 "2009-04-19T01:16:59Z")

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Does this not work for if you want to lable m4a.

When I try to lable the mp3 I can change the track number from

Track 3 to Track 03

But if I pull up the m4a files, I cannot change it so it has a leading zero.

Is this just the way m4a files work? Or is it something I am doing wrong

Thanks and thanks for having an excellent program, it's the best I've seen so far.

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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: [April 19, 2009, 9:15am UTC](https://community.mp3tag.de/t/leading-zero-in-track-numbers-for-mp4/8260/2 "2009-04-19T09:15:03Z")

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The m4a tagging format does not support leading zeroes.

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### 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, 12:21pm UTC](https://community.mp3tag.de/t/leading-zero-in-track-numbers-for-mp4/8260/3 "2026-02-09T12:21:30Z")

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