# TPOS or DISCNUMBER

**URL:** https://community.mp3tag.de/t/tpos-or-discnumber/5105
**Category:** Support
**Created:** [July 3, 2007, 4:12pm UTC](https://community.mp3tag.de/t/tpos-or-discnumber/5105 "2007-07-03T16:12:28Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![lemmy999](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/l/2acd7d/32.png) [@lemmy999](https://community.mp3tag.de/u/lemmy999)
#### Post date: [July 3, 2007, 4:12pm UTC](https://community.mp3tag.de/t/tpos-or-discnumber/5105/1 "2007-07-03T16:12:28Z")

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When I am tagging my FLAC files, I use DISCNUMBER and it works will with SlimServer. However on my MP3 files I am importing to Itunes, I was using TPOS and Itunes seems to be ignoring it. Should I still use DISCNUMBER in the extended tags (and then MP3Tag will save it as TPOS)?

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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: [July 5, 2007, 6:44am UTC](https://community.mp3tag.de/t/tpos-or-discnumber/5105/2 "2007-07-05T06:44:54Z")

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Yes you must use DISCNUMBER  
See [https://docs.mp3tag.de/mapping](https://docs.mp3tag.de/mapping)  
The ID3v2 frames get mapped to more meaningful names.

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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, 12:20pm UTC](https://community.mp3tag.de/t/tpos-or-discnumber/5105/3 "2026-02-09T12:20:23Z")

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