Is AAC absolutely better than mp3?
I know that the lossless sound source is of the highest quality, but the file size is too large.
I want to hear it in the smallest possible size with the best possible sound quality!
I think there are many such people. I am the same.
This time, I would like to roughly examine the differences between mp3 and AAC.
I don’t know because it’s a bit of a snob for a hobbyist.
Table of Contents
Effect
Frequency analysis
Let’s listen and compare
conclusion
Effect
Since this is a compressed sound source, casual listening is an important premise.
First, let’s abandon the stereotype that “AAC is better.”
Looking at the net, there are people who write that “AAC is better because it came out later” or “AAC is better because it is an improved version of mp3”, but the compression efficiency is good and the sound you can really hear I don’t think always be the same to improve.
This study then only confirms the “objectively understandable difference” for each format and does not determine the superiority or inferiority of sound quality.
Personally, assuming 320 kbps, even if it is a compressed sound source, be it mp3 or AAC, the audible range is perfectly suppressed, so I think the sound you hear is the same, and I only listen casually. I don’t even have to hear the slightest difference.
Honestly, 128 kbps is fine for portable use (although the audible range changes significantly compared to 320 kbps), but if you’re looking for a premium music experience with home audio, you should use a compressed sound source first. use time.
Frequency analysis
There are many other people who do the same, but I’ll check it out myself.
Note that the vertical and horizontal widths differ for each graphic.
All encoding to mp3 / AAC is done with iTunes.
First, I prepared a FLAC sound source sample. The genre is rock.
The characteristics of 4608 kbps bit rate / 96 kHz sampling rate / 24 bit bit depth of
frequency are as follows. This is the original way.
Generally, the human audible range is said to be around 20Hz to 20kHz *, but with FLAC, you can see that information is also included in the ultra-high range above 20kHz.
* Actually, it seems that most people have a hard time distinguishing between 15 kHz and higher.
Then AAC / 320 kbps
* Sampling frequency 44.1 kHz / Bit depth 16 bit
