Cannot read properties of undefined (reading 'docType') about music-metadata

[Borewit]

Looks like your audioBuffer contains invalid audio data after the initial call. Looks like an issue in your project.

[Borewit]

What you can try @thryfts, to remove explicit file type declaration:

change this

const metadata = await mm.parseBuffer(audioBuffer, { mimeType: 'audio/webm' });

into:

const metadata = await mm.parseBuffer(audioBuffer);

Alternatively, for debugging purposed, check the buffer with: fyle-type, filetypefrombufferbuffer().

I strongly suspect that you suffer from a synchronization issue, when pushing subsequential files to you backend. In other words, only you initial buffer is aligned with the audio file, the second and following buffer are not aligned.