New extension: AudioVisualizer

[github-actions]

Description

This extension provides the ability to record audio from the microphone and play it back through the speakers. It also provides the ability to monitor real-time audio data from the microphone and master output, which can be used to create audio visualizations such as a spectrogram, oscilloscope, RMS/Peak meter, or other animations which respond to properties of the audio signal.

How to use the extension

The extension provides events (StartMicRecording/StopMicRecording) to record audio from the microphone using the MediaStream Recording API, and then the SaveMicRecording event pushes those recordings to the project data so that the recording can be played back through the sound manager with the PlayMicRecording event. It also provides access to real-time audio data from the microphone and the Howler master output with GetAnalyzerFrequencyData/GetAnalyzerTimeDomainData events (which use WebAudio AnalyserNode objects), to allow a user to create audio visualizations

Checklist

• I've followed all of the best practices.
• I confirm that this extension can be integrated to this GitHub repository, distributed and MIT licensed.
• I am aware that the extension may be updated by anyone, and do not need my explicit consent to do so.

What tier of review do you aim for your extension?

Community (Unreviewed)

Example file

GDMicRecorder.zip

Extension file

AudioVisualizer.zip

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Extension by @giannpls

You can update the extension on this "Pull Request" by commenting the update command: in the comment field, type !update, then drag and drop a zip file with your extension file in the commenting field, like how you initially submitted the extension. It should look like this:

!update [MyExtension.zip](https://github.com/GDevelopApp/GDevelop-extensions/files/12709661/MyExtension.zip)

It can take a few seconds for the file to fully upload and show as the above. Once it is like shown above, click "Comment" and let the bot do the rest!

[moolbie]

i think you should make this into 2 seperate extensions, 1 for recording audio and 1 for visualising

[giannpls]

i think you should make this into 2 seperate extensions, 1 for recording audio and 1 for visualising

Sorry for the late reply, I noticed this now after updating the submission.

I'm not sure it makes sense to separate recording from visualization since recording actually requires visualization in order to display things like the microphone signal level which are necessary for troubleshooting and user experience.

If anything I would consider changing the name of the extension to more accurately reflect its content.