MP3 Ape Flac iTunes Plus AAC How to look at the sound quality of these audio formats need professio

There is nothing professional that is not professional, originally these formats are just audio compression technology.

The bitrate of audio is by definition the same as the bitrate transmitted over the network, which refers to the amount of data per unit of time, and the higher the visible bitrate, the more sound is collected per unit of time, and the closer it is to the sound at the time of recording.

Generally speaking, the amount of data after digitization is 500 kbps 1 Mbps - this is a considerable capacity, for example, 500 kbps means that five minutes of audio will occupy 150M data space, so in order to store audio efficiently, we need to compress the audio file, and the compression method is divided into two categories: lossless compression and lossy compression.

Lossless compression, as the name suggests, is compression without losing data, and APE and FLAC fall into this category. Since there is no data loss, there is no optimal bitrate for these two types of compression methods - what is the bitrate of the original audio, and what is the bitrate after compression. There are only two differences:

The algorithms for compression are different, and the software is licensed differently.

Lossy compression is to reduce the amount of data at the same time as compression, so the sound quality is only approximate to the original sound in **, AAC (including AAC+) and *** belong to this category. This kind of audio data is reduced by cutting the data at the edge of the bass and treble areas that the human ear is not good at capturing, and then compressing it, AAC supports up to 512 Kbps, *** supports up to 320 Kbps, and the highest bit rate supported by the two formats is naturally the best bit rate for sound quality.

So in conclusion: for the same end of the audio, the sound quality of APE and FLAC is the same, and the same as the CD sound quality (the PCM used by the CD supports up to Kbps, which is rich enough for audio sampling), and the AAC can be better than the *** sound quality in terms of the supported bit rate alone, but the specific audio file depends on the bit rate taken when compressed, for example, the AAC file compressed by the 128 Kbps bit rate will not have better sound quality than the *** file of 320 Kbps.

It depends on the bitrate you convert. Generally speaking, the higher the bitrate, the better the sound quality. AAC **Generalization, Apple Lossness is recommended, which is Apple's lossless format, which is equivalent to APE or FLAC

You can convert the *** format with Qianqian Jingting,It's best to save it as320K sound quality,So that the sound quality is better,You can split it with QQ video and audio,If you think it's good, adopt it。

Both of these sound qualities are uncompressed or less compressed. For example, FLAC, a song can be called more than 30 times, and the sound quality is very good. In addition, both formats can be listened to with Qianqian Jing**.

Lossless format much clearer than ***.

1. AAC introduction.

AAC is Advanced

Abbreviation for Audiocoding (Advanced Audio Coding), this ** format has a higher quality than ***, AAC is created by Fraunhofer

An audio format co-developed by IIS-A, Dolby, and AT&T as part of the MPEG-2 specification. The algorithm used by AAC is different from the algorithm of ***, and AAC improves the encoding efficiency by combining its functions or those of the Blind Solution. AAC's audio algorithm far exceeds some previous compression algorithms (such as ***) in terms of compression power.

It also supports up to 48 audio tracks, 15 low-frequency audio tracks, more sample rates and bit rates, multi-language compatibility, and higher decoding efficiency. In fact, AAC's algorithm was completed in 1997, when it was called MPEG 2

AAC, because it is still an extension of the MPEG 2 standard. But with the MPEG 4 audio standard taking shape in 2000, MPEG 2

AAC is also used as the core of its coding technology, and some new coding features have been added, so it is also called MPEG 4

In the spectrum, it is not clear that the high-frequency part is better than *** of the same frequency, or even inferior to the latter. But you can also easily see that the AAC signal is significantly denser and thicker than ***! The actual listening effect can be left to you to feel for yourself, and it is guaranteed that AAC is indeed much stronger than ***!

In conclusion, AAC can provide better sound quality on the premise of being 30% smaller than *** files.

Features of AAC::

Improved compression: Higher sound quality can be obtained with a smaller file size;

Multi-channel support: up to 48 full-range channels are available;

Higher resolution: up to 96kHz sampling frequency;

Dolby Laboratories' conclusion:

The 128kbps AAC stereo** is considered by experts to be imperceptible to the difference from the original uncompressed sound source;

The performance of the AAC format at 96Kbps bit rate exceeds that of the 128Kbps format.

The same is 128kbps, and the sound quality of AAC format is significantly better than ***;

AAC is currently the only webcast format that can achieve "excellent" results in all EBU audition test items.

On the one hand, the characteristics of multi-channel and high sampling rate make it very suitable for future *** audio; On the other hand, the high sound quality at low bit rate makes it also suitable for mobile communications, networks, broadcasting and other fields, which is really all-round!