Скачать или смотреть What You Lose When You Compress Music to MP3, M4A, WMA, etc. (Tutorial and Example with Audacity)

This video shows what is lost when you convert your music to a lossily compressed format, such as MP3, M4A, or WMA. Although this video only shows the difference between a WAV (uncompressed) and MP3, similar results would occur if you compared WAV to M4A, WMA, or any other lossy format. I have since published another comparison video comparing WAV to other lossy formats, include M4A and Opus:    • MP3 vs M4A (AAC-LC, AAC-HE v1, & AAC-HE v2...   including at extremely low bitrates (as low as 12 kbps, where you can hear the newer formats easily beat MP3!!).

NEW MP3 vs. M4A (AAC-LC, AAC-HE v1, & AAC-HE v2) vs. Opus Comparison:    • MP3 vs M4A (AAC-LC, AAC-HE v1, & AAC-HE v2...  

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-- VIDEO CHAPTERS --
0:00 Introduction
0:23 Uncompressed WAV Sample
1:03 320 kbps MP3 Sample
2:13 Difference between WAV & 320 kbps MP3
3:25 64 kbps MP3 Sample
4:34 Difference between WAV & 64 kbps MP3

Generally, MP3 is regarded as an inefficient compression format. Newer standards like M4A, WMA, Vorbis, and Opus offer better quality for a given bit rate. However, with any form of lossy compression, some information is lost. Lossless compression codecs like FLAC and AIFF preserve quality; however, they do not reduce file size nearly as much as lossy formats.

When the WAV was converted to a 320 kbps MP3, not much information was lost. However, a lot of information was lost when the WAV was converted to a 64 kbps MP3.

It's 2017, and I think websites like Amazon and iTunes should no longer be offering only MP3s/M4As. With storage space so cheap and internet speeds so fast, lossless audio formats should be widespread. Lossy formats still have their uses, for example putting on a phone with little internal storage.

YouTube compresses video and audio after they are uploaded, reducing the quality slightly. The original audio files used in this video are available at https://drive.google.com/open?id=1jx6...

I use the same technique to compare MP3 to M4A in another video:    • M4A vs MP3 Audio Quality Comparison  

If you add the difference file to the MP3 file, you will get the original WAV quality back:    • Restoring MP3 Quality  

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