There are supposed to be killer samples for all four, forcing them to require a higher bitrate to achieve transparency, but interest in finding these seems to have dropped. Apple Lossless Encoder: File is compressed with no loss in. a 160 kbps AAC file is similar in quality to a 192 kbps VBR MP3 file (with the AAC file weighing in at less than 90 of the equivalent MP3 file size) L. MP3 has been the standard format for music playback on different digital audio players. I've never been able to ABX a 128 Kbps track, and music sounds great even at 96 Kbps (for stereo!). Which one and why MP3 and MP4 (AAC): File size is compressed with some loss in audio quality. AAC provides audio encoding that compresses much more efficiently than older formats, such as MP3, yet delivers quality rivaling that of uncompressed CD audio. ĪAC and Vorbis are certainly better codecs, achieving transparency most of the time at closer to 160 Kbps. HydrogenAudio, a trustworthy source as far as "audiophile" claims go, says that anything from `-V0 to -V3` should be transparent under most conditions. I can still ABX a very small number of songs (last I tested), but even these go away by `lame -V0`, which is the highest quality VBR mode. The licensed AAC encoder that is included in Winamp. But now, most music is transparent at `lame -V2` settings, which gives approximately 192 Kbps results. However, decoder delay establishes the minimum encoder delay possible (that is, 1024 for AAC). This is in contrast to encoder delay which is determined by the encoder and encoding configuration used. Even in the early 2000s you needed 256-320 Kbps to have a shot at transparency. For AAC this number is typically 1024 and is algorithmically based. Xiph's Monty, in the post you link, mentions being able to distinguish between them using only their results as a party trick. I certainly can't, and I have pretty decent gear and have been listening to (and working on) music for a very long time.īack in the 90s, all mp3 encoders were shit. It converts freely between MP3, M4A/AAC, FLAC, WMA. Other than (possibly) extremely rare killer samples, you're unlikely to be able to ABX a LAME encoded track at 256 Kbps. fre:ac is a free audio converter and CD ripper with support for various popular formats and encoders. LAME has been great for at least a decade now. Otherwise, AAC is a good format to choose for your video. In all, if you enjoy watching DVDs or Blu-ray movies with surround sound, AC3 is the better choice. On the whole your comment is great, but I think this point might be revealing of either your age or the last time your looked at mp3 encoders. Yet, the high efficient compression ratio and a wide audience base of AAC on the internet carve out a place for itself to continue thriving. Try high-bitrate Opus on most samples and you're a lot less likely to get above-chance results on an ABX test, pretty much ever, at high bitrates. This is largely because MP3 is a crappy, old format.
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