ogg

Two OGG files: a 1 second clip of 2.3 KB and a 5 second clip of 11 KB, both a 440 Hz tone encoded with Opus at 16 kbps and 24 kHz. These are among the smallest files in the whole collection. OGG is an open container used by games, Linux software and some messaging apps, and Safari has been slow to play it, which makes it a good compatibility check. If your site claims to accept OGG, test it here. Check the MIME type your server sends back (audio/ogg), the duration your player shows, and how the file behaves in each browser.