Guide on creating and synchronizing an XML/JSON file that stores beat information (BPM) for audio using JavaScript

Looking to sync Javascript events with the BPM of music for a game similar to "Guitar Hero."

We start with:

In order to create a track file based on beat detection (with each BPM saved like sheet music), how can it be generated beforehand rather than in real-time?

And next:

What is the best way to synchronize it with a JavaScript sound library?

Any thoughts or ideas? Thank you in advance.

Answer №1

If you're looking for the answer to question 1, check out this link:

https://example.com/sample-file.js#L107

Explore the capabilities of the Echo Nest API, such as offline beat detection, by running a Javascript example in your own browser:

https://example.com/tester.html

For question 2, synchronize your game logic clock with audio playback instead of relying on Javascript system time. Check out an implementation example here:

https://example.com/show.js#L1072

By listening for audio "on time update" events and interpolating time using the system clock between those events, you can achieve better synchronization.

Note: The code provided is authored by me.

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