Question 1

How to record microphone audio with Recorder.js?

Accepted Answer

Use `navigator.mediaDevices.getUserMedia` to get a MediaStream, connect it to a Web Audio API node like `AudioContext.createMediaStreamSource`, then pass that node to Recorder.js to start recording. You'll need to handle permissions and audio context setup.

Question 2

Does Recorder.js support MP3 export?

Accepted Answer

No, Recorder.js only exports WAV format. For MP3, you'd need to convert the WAV Blob using additional libraries or server-side processing, which adds complexity.

Question 3

Recorder.js vs MediaRecorder API: which is better?

Accepted Answer

Recorder.js is simpler for direct Web Audio API integration, but MediaRecorder API is native, more modern, supports multiple formats, and is actively maintained. Use Recorder.js only for legacy Web Audio projects needing WAV output.

Question 4

Is Recorder.js still maintained in 2024?

Accepted Answer

No, the README explicitly says it's not actively maintained due to lack of time, so you might encounter bugs or compatibility issues with current browsers. Consider forks or alternatives.

Question 5

How to handle large audio files without crashing?

Accepted Answer

Adjust the `bufferLen` config to manage memory, but this can cause audio artifacts if set incorrectly. For long recordings, split audio into chunks or use web workers, though Recorder.js has limited guidance here.

Question 6

Can Recorder.js record from multiple audio sources?

Accepted Answer

It can only record from a single Web Audio API node at a time. To capture multiple sources, you'd need to mix them into one node manually, which adds complexity and isn't documented.

Recorderjs

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