What is lossless? Part 3
AAC abbreviation
Advanced Audio Coding. Lossy compressed audio file format used by the iTunes Store. The extension is “.m4a”. One of the audio data compression methods included in the video data succeeding MP3 (MPEG-1 Audio Layer-3), which is a method of compressing audio data. The number of quantization bits/sampling rate supports up to 24 bits/96 kHz. However, due to lossy compression, the sound quality is lower than lossless or uncompressed audio files. Also, because it is a lossy compression, it is not called lossless or high resolution.
If I compare AAC with a letter,
I wrote a message on a new sheet of paper, but I wanted to inform the other party of the important things as soon as possible, so I cut the “beginning/end” of “beginning/middle/end” with scissors and only the ” naka”. To pass to The person receiving the letter reads the letters without knowing what the new paper and “Begin/End” text is like.
● Click here for a more detailed explanation of the above audio codec.
■ An audio codec is
a device or software that encodes sent data in the format of an audio file and decodes the encoded data back to its original state.
Let’s compare the sound quality.
How do you listen to “ALAC lossless”, “ALAC hi-res” and “AAC”? This time the singer-songwriter Moeka Giga appeared and she made us experiment listening and comparing the sound quality. We will deliver a realistic voice of Moeka Giga, if the way the sound is actually heard differs depending on the format of the sound source.
