Player doesn't allow seeking ahead even if server supports byte-range requests

[eplusminus]

The server that's serving my MP3 files definitely supports byte-range requests, and returns an "Accept-Ranges: bytes" header for every request. If I just hit the URL for one of the files directly in the browser, the built-in audio player lets me seek ahead anywhere in the file without making me wait for preloading. But the audio.js player doesn't.

Looking at the code, I think this is just unsupported in the player UI, but I'm hoping I've just missed something.