# BPM halver/doubler

**URL:** https://community.mp3tag.de/t/bpm-halver-doubler/4925
**Category:** Support
**Created:** [May 25, 2007, 2:51am UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925 "2007-05-25T02:51:18Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![jcclow](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/j/5f8ce5/32.png) [@jcclow](https://community.mp3tag.de/u/jcclow)
#### Post date: [May 25, 2007, 2:51am UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/1 "2007-05-25T02:51:18Z")

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Ok, I just swapped to MP3Tag from Tag&Rename. The feature set is amazing and the customizations available make this the most capable tagger ever.

I have just one request, a way to halve or double the BPM field of ID3V2. Alot of BPM tagging software doubles Hip-Hop and Techno.

I'm not sure if this possible already with Regex or a macro. If anyone has any insight, I'm all ears.

Thanks again for the great program!

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### Author: ![jcclow](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/j/5f8ce5/32.png) [@jcclow](https://community.mp3tag.de/u/jcclow)
#### Post date: [May 25, 2007, 3:52am UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/2 "2007-05-25T03:52:25Z")

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I figured it out myself after some poking around...

> Actions  
> New Action Group (name it whatever you want)  
> Enter  
> New Action  
> Select "Format Value"  
> OK  
> Select "BPM" for the field  
> Type "$div(%BPM%,2)  
> OK, OK, OK

It works perfectly!

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### Author: ![djquartz](https://community.mp3tag.de/user_avatar/community.mp3tag.de/djquartz/32/12233_2.png) [@djquartz](https://community.mp3tag.de/u/djquartz)
#### Post date: [February 10, 2024, 3:17pm UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/3 "2024-02-10T15:17:53Z")

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How do you multiply by 2?

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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: [February 10, 2024, 3:20pm UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/4 "2024-02-10T15:20:12Z")

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Did you have a look at the [documentation](https://docs.mp3tag.de/scripting/#arithmetic-functions)?

Something like  
`$mul(x,y)`

 ![image](https://community.mp3tag.de/uploads/default/original/3X/3/9/399e174aa4d9872bc0a0edd40d86c6d1f2721739.png)

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### Author: ![djquartz](https://community.mp3tag.de/user_avatar/community.mp3tag.de/djquartz/32/12233_2.png) [@djquartz](https://community.mp3tag.de/u/djquartz)
#### Post date: [February 10, 2024, 3:24pm UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/5 "2024-02-10T15:24:24Z")

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I was going to dig in and look for the operators. Thanks

Changed div to mul and voila.

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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: [March 11, 2024, 3:24pm UTC](https://community.mp3tag.de/t/bpm-halver-doubler/4925/6 "2024-03-11T15:24:48Z")

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