AAC vs mp3 quality
Answer 1 :
Q: What is the difference between AAC and MP3?
The other answers here helped to talk about the technical differences between the two lossy compression formats.
I’ll take a different tactic with this answer and explain how they sound different to the ear.
To explain the difference in abbreviated form, at any given bitrate, AAC will sound better in the higher ranges, while MP3 will sound better in the lower ranges.
MP3 compression adds a specific sound to the sound. This is very noticeable at bit rates of 128 kbps and below; everything sounds confusing. At higher bit rates like 256 kbps (where it’s hard to hear) or 320 kbps (where you need high-end hardware to listen to artifacts), MP3 compression is much less of a problem.
AAC compression is much better at high frequencies. “AAC” in AAC is that music sounds weak, especially at low bit rates. If you like music with significant low frequency content (drums, electronic drums, bass, bass, etc.), you will miss some of that bass in AAC files; they just sound like they lack solidity. However, as with MP3, the higher the bit rate, the less problem you will be able to hear.
At any bit rate below 256 kbps, I personally prefer AAC. The lack of solidity in AAC compressed music is less undesirable than in Futz with MP3 compression.
At 320 kbps, these artifacts are very difficult to hear in any compression format, so the fact that MP3 is more compatible in most cases gives this compression algorithm an advantage.
But we also live in today’s world where conventional hard drives have more than 12 terabytes. A completely uncompressed album (that is, AIFF or WAV format) is less than 650 megabytes in size. (** grip calculator **) You can put 18,461 uncompressed WAV or AIFF albums on a 12TB hard drive. So why do we continue to use MP3 and AAC today?
Answer 2:
Both are compressed audio files, and although the audio quality is fairly similar, the AAC format was designed to improve over MP3 in the following ways:
Higher sampling frequency (8 kHz to 96 kHz) than MP3 (16 kHz to 48 kHz)
Up to 48 channels (MP3 supports up to two channels in MPEG-1 mode and up to 5.1 channels in MPEG-2 mode)
Arbitrary bit rates and variable frame length. A constant bit rate standardized with a bit pool.
Higher efficiency and simpler filter bank (uses pure MDCT instead of hybrid MP3 encoding)
Higher encoding efficiency for stationary signals (AAC uses a block size of 1024 or 960 samples, which can be encoded more efficiently than 576 MP3 blocks)
Higher encoding precision for transition signals (AAC uses 128 or 120 sample block size, which provides more precise encoding than 192 MP3 sample blocks)
You can use a Kaiser-Bessel derived window function to eliminate spectral leakage by enlarging the main lobe
Much better handling of audio frequencies above 16 kHz
More flexible articulation stereo (different methods can be used in different frequency ranges)
Add additional modules (tools) to improve compression efficiency: TNS, inverse prediction, PNS, etc. These modules can be combined to create different encoding profiles.
Answer 3:
Both are lossy codecs, aimed at significantly reducing file size without affecting sound quality as much as you might think.
AAC is 2 generations younger than MP3, so by then the algorithms had improved significantly, and most tests confirmed that 256 kbps AAC sounds just as good, if not better than 320 kbps MP3, which is why Apple chose this file format for iTunes.
AAC supports higher sample rates than MP3, although I’ve recently seen some weird MP3 implementations (incompatible with just about everything) that do this too.
After all, storage and internet speed are not an issue, lossy compression should be gone by now in favor of FLAC or ALAC. It seems that some bad habits are very difficult to break. 🙂
Answer 4:
AAC stands for Advanced Audio Coding. It was developed by the same people who invented MP3 and is destined to be its successor. Audio in AAC is better than MP3 in almost all cases.
It is more efficient than MP3 in terms of file size precision (bit rate). In other words, an AAC encoded song will sound as good or better than an MP3 encoded with the same bit rate. Therefore, encoding a file at 256 kbps AAC will give you better sound and smaller file size than MP3 at 320 kbps.
