Question 1

How to fix CORS issues with wavesurfer.js?

Accepted Answer

Ensure your audio server sends Access-Control-Allow-Origin headers; wavesurfer.js cannot fetch cross-origin audio without proper CORS setup, as stated in the FAQ.

Question 2

Does wavesurfer.js support streaming audio?

Accepted Answer

Only with pre-decoded peaks and duration; real-time streaming isn't natively supported due to Web Audio API limitations, requiring extra preprocessing steps.

Question 3

Wavesurfer.js vs Howler.js for audio playback?

Accepted Answer

Wavesurfer.js excels in interactive waveform visualization and plugins, while Howler.js is better for simple, cross-browser audio playback without visualization needs.

Question 4

How to customize wavesurfer.js waveform colors?

Accepted Answer

Use CSS with ::part() selectors on elements like cursor and region, as wavesurfer.js uses Shadow DOM; refer to the styling example in the README.

Question 5

Can wavesurfer.js handle large MP3 files?

Accepted Answer

Yes, but you need pre-decoded peak data to avoid memory issues; tools like audiowaveform can generate peaks, as mentioned in the FAQ.

Question 6

What if my audio and waveform don't sync?

Accepted Answer

Convert VBR files to CBR or use the Web Audio shim plugin for accuracy; the README notes this mismatch issue with variable bit rate audio.

Wavesurfer.js

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