Audio streaming has different constraints:
File size: - MB per song vs MB+ for video. Easier to cache and deliver.
Catalog: million+ tracks. Large catalog, small files.
Playback patterns: Users skip, repeat, shuffle. Pre-buffer next likely songs.
Architecture: Audio files in object storage → CDN → Client app with local cache. Spotify caches recently played and predicted-next songs locally. Offline mode downloads entire playlists.