just a basic fileserver, in our case it’s implemented in Go but you could use an S3 bucket or whatever. just needs to be accessible over http
Discussion
end to end it goes roughly like this:
1. user uploads an audio file
2. backend uses ffmpeg to convert it into HLS files (chunked mp3s + text manifest)
3. HLS files made available on basic fileserver over http
4. HLS manifest url goes into note metadata
5. client gets note, fetches manifest, (manifest includes time markers + mp3 chunk urls) and JIT loads chunks into player