BPM sync on audio channels

sillypanopticon · November 30, 2025, 2:31am

hello!!! i’m about to finish and release an extension that helps sync events to the BPM of an audio file on either a sound channel, or a music channel, for things like rhythm games, or visualizations in a gdevelop game… i really hope you guys enjoy

github.com/GDevelopApp/GDevelop-extensions

Sync Music/Sound Channel BPM

opened 03:50AM - 30 Nov 25 UTC

heisenhixie

✨ New extension

### Description Set the BPM of a channel playing a sound and set up events to a…ctivate on a beat. For example, if you have an audio file on sound channel 1, you can set it's BPM. On the beat, you can activate events, such as a camera zoom tween, or color change. Reminder that the on beat detection must be running every frame of when you want it to detect the beats! ### How to use the extension On an event that runs every frame, you are to add the "**Beat handler**" action, sound or music, and set its channel to the channel currently playing a track. This is how the beat length is calculated. This extension does not work otherwise. **You cannot run both a music, and sound handler at the same time. They depend on the same hidden variables. You must run one at a time. This might be changed in a later update.** You can set the BPM, with the "**Set the BPM**" action. It must be the BPM of the audio file you have playing, or it won't look synced. You can add events when the beat is hit by using the "**If a beat on a (music or sound) channel is hit**" condition. This object runs once during the frame of the beat. ### Checklist - [x] I've followed all of [the best practices](http://wiki.compilgames.net/doku.php/gdevelop5/extensions/best-practices). - [x] I confirm that this extension can be integrated to this GitHub repository, distributed and MIT licensed. - [x] I am aware that the extension may be updated by anyone, and do not need my explicit consent to do so. ### Example file [BPM Sync Example.zip](https://github.com/user-attachments/files/23837553/BPM.Sync.Example.zip) ### Extension file [SyncChannelBpm.json](https://github.com/user-attachments/files/23837557/SyncChannelBpm.json)

I have a showcase on my channel of it so far, if anyone wants to see it, and how it works

petlimpet · November 30, 2025, 8:10am

Cool - I’ve had ideas for a rhythm games and i wondered how you would sync it!

sillypanopticon · November 30, 2025, 9:23am

i hope you find it useful then! i plan on updating it in the future to help specifically with rhythm games (like detecting which beat or measure of the song you’re in, and maybe adding looping points)

SnowyRawrGamer · December 1, 2025, 5:03am

THIS WILL HELP ME SO MUCH!
I made 99% of a rhythm game template, but couldn’t seem t get things to sync, so this will be amazing for me!
Thanks so much!