Often you can predict what effects your scene will need. Sometimes you can't, and in that case you can't compress. But it's entirely possible that you could de

Often you can predict what effects your scene will need. Sometimes you can't, and in that case you can't compress. But it's entirely possible that you could decompress some of that audio into RAM beforehand if you're not confident every device can play that audio compressed immediately. Or store back a cache file temporarily. Or just not even worry about the CPU because the vast majority of users are GPU-limited rather than CPU-limited.