# Generating %DISCNUMBER% Tags
**URL:** https://community.mp3tag.de/t/generating-discnumber-tags/4117
**Category:** Support
**Created:** [November 28, 2006, 2:05pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117 "2006-11-28T14:05:05Z")
**Posts on this page:** 9
**Page:** 3
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [April 22, 2014, 4:01pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/41 "2014-04-22T16:01:00Z")
**$regexp(%\_directory%,.+(\d).\*,$1)**
That's what I'm using. It's simple but effective. It gives you the last number (single digit) of the directory name. That works almost for all sorts of folder naming schemes.
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### Author:  [@Logan](https://community.mp3tag.de/u/Logan)
#### Post date: [April 22, 2014, 4:33pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/42 "2014-04-22T16:33:03Z")
Wow- nothing like bring an eight year old thread back!
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### Author:  [@chrisp\_uk](https://community.mp3tag.de/u/chrisp_uk)
#### Post date: [April 22, 2014, 7:19pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/43 "2014-04-22T19:19:38Z")
> [@DetlevD](#):
>
> **$if($neql($regexp(%\_directory%,'^.\*\s\*(?:Disc|CD)\s\*0\*(\d+).\*$','$1',0),%\_directory%),$regexp(%\_directory%,'^.\*\s\*(?:Disc|CD)\s\*0\*(\d+).\*$','$1',0),%DISCNUMBER%)**
>
> DD.20140422.1255.CEST
Thank you, that works nicely. It is so elegant once you know but it just didn't occur to me 🙂
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### Author:  [@woelfchen](https://community.mp3tag.de/u/woelfchen)
#### Post date: [July 5, 2014, 5:09am UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/44 "2014-07-05T05:09:53Z")
> [@pone](#):
>
> **$regexp(%\_directory%,.+(\d).\*,$1)**
> That's what I'm using. It's simple but effective. It gives you the last number (single digit) of the directory name. That works almost for all sorts of folder naming schemes.
this one with the condition, when the foldername contains "cd[number]", "CD[number]", "disc[number]" or "DISC[number]":
**$if($and($isdigit($regexp(%\_directory%,.+(\d)._,$1)),$or($grtr($strstr($lower(%\_directory%),'cd'),0), $grtr($strstr($lower(%\_directory%),'disc'),0))),$regexp(%\_directory%,.+(\d)._,$1),)**
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [July 5, 2014, 8:22am UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/45 "2014-07-05T08:22:44Z")
> [@woelfchen](#):
>
> ... with the condition, when the foldername contains "cd[number]", "CD[number]", "disc[number]" or "DISC[number]":
> **$if($and($isdigit($regexp(%\_directory%,.+(\d)._,$1)),$or($grtr($strstr($lower(%\_directory%),'cd'),0), $grtr($strstr($lower(%\_directory%),'disc'),0))),$regexp(%\_directory%,.+(\d)._,$1),)**
Returns this expression the same result?
**$regexp(%\_directory%,'.\*(?:cd|disc|disk)\s\*0\*(\d+).\*','$1',1)**
resp.
**$if($neql($regexp(%\_directory%,'.\*(?:cd|disc|disk)\s\*0\*(\d+).\*','$1',1),%\_directory%),$regexp(%\_directory%,'.\*(?:cd|disc|disk)\s\*0\*(\d+).\*','$1',1),)**
... or ...
**$if($eql($regexp(%\_directory%,'.\*(?:cd|disc|disk)\s\*0\*(\d+).\*',,1),),$regexp(%\_directory%,'.\*(?:cd|disc|disk)\s\*0\*(\d+).\*','$1',1),)**
DD.20140705.1230.CEST
Edit. Suppress leading zeroes.
DD.20140705.1852.CEST
---
### Author:  [@woelfchen](https://community.mp3tag.de/u/woelfchen)
#### Post date: [July 5, 2014, 11:52am UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/46 "2014-07-05T11:52:30Z")
> [@DetlevD](#):
>
> Returns this expression the same result?
>
> **$regexp(%\_directory%,'.\*(?:cd|disc)\s\*(\d+).\*','$1',1)**
>
> resp.
>
> **$if($neql($regexp(%\_directory%,'.\*(?:cd|disc)\s\*(\d+).\*','$1',1),%\_directory%),$regexp(%\_directory%,'.\*(?:cd|disc)\s\*(\d+).\*','$1',1),)**
>
> DD.20140705.1230.CEST
nearly...
these are my test-folders:
a cd01 (test)
b disc02 (test)
cd 03 (test)
d disc 04 (test)
e keine disc
the first expression also creates 'eine' for the last folder, rest in two-digits (with a leading zero)
the second expression works nearly correct (no discnumber for the last folder), but the rest in two-digits (with a leading zero)
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [July 5, 2014, 3:00pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/47 "2014-07-05T15:00:05Z")
> [@woelfchen](#):
>
> nearly... two-digits (with a leading zero) ...
I have changed my formatstring in order to suppress leading zeroes, ...
now both formatstrings give nearly the same result.
Note: Prepare your formatstring also for discnumbers greater than 9.
Here is an export script with test cases ...
[Test.20140705.ExtractCDNumber.mte](https://community.mp3tag.de/uploads/default/original/2X/3/3dd58b3caf75e467139ef368b8350f65b057f88b.mte) (5.76 KB)
DD.20140705.1900.CEST
[Test.20140705.ExtractCDNumber.mte](https://community.mp3tag.de/uploads/default/original/2X/3/3dd58b3caf75e467139ef368b8350f65b057f88b.mte) (5.76 KB)
---
### Author:  [@woelfchen](https://community.mp3tag.de/u/woelfchen)
#### Post date: [July 5, 2014, 8:13pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/48 "2014-07-05T20:13:41Z")
> [@DetlevD](#):
>
> I have changed my formatstring in order to suppress leading zeroes
thx, now i've two alternatives 😉
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:20pm UTC](https://community.mp3tag.de/t/generating-discnumber-tags/4117/49 "2026-02-09T12:20:01Z")
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