# Traktor Catalog Number

**URL:** https://community.mp3tag.de/t/traktor-catalog-number/44882
**Category:** Support
**Tags:** player
**Created:** [March 18, 2019, 12:33am UTC](https://community.mp3tag.de/t/traktor-catalog-number/44882 "2019-03-18T00:33:33Z")
**Posts on this page:** 1
**Showing post:** 13

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### Author: ![LyricsLover](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/l/c6cbf5/32.png) [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)
#### Post date: [May 11, 2024, 5:29pm UTC](https://community.mp3tag.de/t/traktor-catalog-number/44882/13 "2024-05-11T17:29:49Z")

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A quick test shows:  
Traktor Pro v3.10 writes the catalog number only in a non-readable format into a **mp3** file.  
Traktor Pro v3.10 writes the catalog number as a standard tag CATALOGNUMBER in a **m4a** file:  
 ![image](https://community.mp3tag.de/uploads/default/original/3X/2/8/280f5b5836f31e54353464a7636ec602f95ef826.png)

Then I repeated my test from [here](https://community.mp3tag.de/t/decoding-the-traktor-4-binary-data-inside-a-priv-tag/54352) and it is still valid vor Traktor Pro v3.10:  
Traktor writes the catalog number only in a proprietary (not public known) format into mp3 files:

 ![image](https://community.mp3tag.de/uploads/default/original/3X/5/8/58107b29f6fd1f35105fef20270761e729291c55.png)

There is nothing you can do other then ask Native Instruments, why they use that prorietary format instead of the widely support standard tags.

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_[View the full topic](https://community.mp3tag.de/t/traktor-catalog-number/44882)._