# convert multi disc album track numbers

**URL:** <https://community.mp3tag.de/t/convert-multi-disc-album-track-numbers/19448>\
**Category:** Support\
**Created:** [October 17, 2017, 5:00am UTC](https://community.mp3tag.de/t/convert-multi-disc-album-track-numbers/19448 "2017-10-17T05:00:11Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![MARijlaarsdam](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/m/6f9a4e/32.png) [@MARijlaarsdam](https://community.mp3tag.de/u/MARijlaarsdam)\
**Post date:** [October 17, 2017, 5:00am UTC](https://community.mp3tag.de/t/convert-multi-disc-album-track-numbers/19448/1 "2017-10-17T05:00:11Z")

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I wanted to convert track numbers from multi disc albums to the following format (d=disc, track=track)

D(0)T

e.g. 101,102..201,202...1001,1002..1010, etc.

While some players understand the disc number field for sorting, some need this trick to correctly sort these albums.

As some of my box sets have \>150 discs I would prefer this to be done automatically.

I created a format value action.  
Field: TRACK  
Format String: $add($mul(%DISCNUMBER%,100),%TRACK%)

One drawback is that the original track number is not stored anymore so repetitive application of this action will create weird results (which can easily be corrected by a function which does exactly the oposite.

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_[View the full topic](https://community.mp3tag.de/t/convert-multi-disc-album-track-numbers/19448)._