# VBR vs. constant bitrate
**URL:** https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280
**Category:** Support
**Created:** [April 10, 2010, 9:14am UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280 "2010-04-10T09:14:17Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@kozinao](https://community.mp3tag.de/u/kozinao)
#### Post date: [April 10, 2010, 9:14am UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/1 "2010-04-10T09:14:17Z")
Hello, I have a question - my collection of mp3s is organized like this:
Folder name:"artist - album name (bitrate)"
bitrate is either number (128kbps, 192kbps) or variable (VBR).
For MP3Tag to rename my folders of albums correctly, I have to use two different settings of folder naming (hence two different mp3tag.cfg files) which I manually switch (through a use of macro obviously) but then I have to restart MP3Tag in order to the different mp3tag.cfg to come in effect. Can MP3 tag somehow recognize that album is in variable bitrate and therefore offer a "VBR" text instead of 136kbps(or any other nonstandart number) in folder renaming (variable %bitrate%)?
Thank you for any advice, other than this, I love this program 🙂
Endy
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### Author:  [@stanman](https://community.mp3tag.de/u/stanman)
#### Post date: [April 10, 2010, 9:23am UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/2 "2010-04-10T09:23:49Z")
Use the field %\_vbr%
The field will contain either VBR or CBR.
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### Author:  [@kozinao](https://community.mp3tag.de/u/kozinao)
#### Post date: [April 10, 2010, 2:56pm UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/3 "2010-04-10T14:56:41Z")
Thanks, but this doesnt help - I would need a decisive algorythm - because if it is CBR, then i want number and suffix "kbps" (like "128kbps"), if it is VBR, then "VBR" is good enought.
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### Author:  [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [April 10, 2010, 4:18pm UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/4 "2010-04-10T16:18:19Z")
You really don't need different mp3tag.cfg files to make different allbum structures with Mp3tag.
Which tool from Mp3tag do you use for renaming?
You can use scripting to check if a file has VBR:
$if($eql(%\_vbr%,VBR),VBR,%\_bitrate%kbps)
[https://docs.mp3tag.de/scripting](https://docs.mp3tag.de/scripting)
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### Author:  [@kozinao](https://community.mp3tag.de/u/kozinao)
#### Post date: [April 10, 2010, 5:19pm UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/5 "2010-04-10T17:19:17Z")
Awesome, that was EXACTLY what I was looking for, thank you very much. 🙂
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:22pm UTC](https://community.mp3tag.de/t/vbr-vs-constant-bitrate/10280/6 "2026-02-09T12:22:18Z")