tl;dr – can you distinguish between flac, mp3, and ogg vorbis?
today pigdevil created the thread "BotB should require renders in .ogg instead of .mp3"
, and provided an audio comparison between lossless encoding, 64 kbps mp3, and 64 kbps vorbis. while i completely agree that vorbis is the better encoder at that bitrate, there's no reason to use 64 kbps on botb given the 10 MB size limit unless your entry is over 20 minutes long. which it should not be.
partly because of that thread and partly from sheer curiosity, i created a sample set of 20 randomly selected songs from botb, given the criteria that:
1. the song must have available source or a >200 kbps mp3 render
2. the song must be less than two minutes long
3. the song must have a score of at least 25
4. the song must have at least five favorites
5. somehow two of them ended up being triangle-only nsfs
each song is rendered once lossless, once as mp3 using lame at v4, and once as ogg using libvorbis at q4 (lame v4 and libvorbis q4 both yield a bitrate of roughly 128 kbps). however, the renders have all been converted back to wav and arranged in a random order.
IF you are interested, please download the set and post (or preferably pastebin/etc) your guesses for which files are encoded which way. the total duration of the files is ~72 minutes, but you don't have to listen to all the renders all the way through, so i expect it would take 30-60 minutes to make your guesses, depending on how thorough you are. if that sounds like too much for you, then feel free to just do the first ten! i'll post the results after a week or something.
(365 MB, .7z)
the numbers in the filenames are entry numbers; you can find the page for entry number x at http://battleofthebits.org/arena/Entry//x/
(note the double slashes).