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Home / News > What is lossless audio and high resolution audio?


What is lossless audio and high resolution audio?

If you only say the purest definition, the so-called "lossless" means uncompressed music. One professional explained this: Lossless audio is the unmodified output of the audio recording process and is the most accurate output reproduction of the existing recording process. This means that in theory it should record the sound perfectly. The sense of detail and space to bring the feelings and emotions that the music show needs to express. However, the problem is that this theoretically non-destructive brings about excessive use of storage space, and many times this kind of occupancy is meaningless, because people often need to place as many audio files as possible in a wired space. Our common studio quality lossless audio formats are AIFF and WAV. It is well known that their volume is not small, so the so-called "lossless compression" is born. Is lossless compression lossless? Yes. Because lossless compression is a reversible compression process, a lossless compression format can also be considered lossless. At this point, our common lossless audio formats are the open source lossless format FLAC, Apple's lossless format ALAC, and Monkeys Audio's APE. Although metaphysically speaking, the lossless compression format has not been lost, because it has lost some of the subtle details of information, but at least it cannot be proved technically.

In fact, we usually say "lossless" refers to the lossless compression of audio, it is cut to meet the narrow bandwidth of the transmission, and then be re-assembled, while retaining all the information. To some extent, it is very similar to the ZIP archives we are familiar with - files or multiple files can be compressed smaller than the original, but it is recoverable.

The compression mechanism for this beats earbuds type of file format is as follows: They use a compression algorithm to "extend" the silent part of the music, but do not compress the actual music content, or delete any data. This is not the same as MP3 files. Damage music format will remove the amount of information in the audio file. In this age when we are totally ignorant of storage space and internet speed, these complicated processes seem to make no sense, but in the past, it was a very real problem to make music files smaller as much beats solo as possible.

In addition to lossless audio, now we can often come up with another term: High Res Audio. Are these two terms referring to the same thing? It is not. High-resolution audio is much higher than MP3 in the amount of information, and is even much stronger than CD quality. Its design goal is to make the audio sound quality as close as possible to the quality of the master disk, but its volume is not incredible.

In fact, many companies in the industry have confused the concept of lossless and high beats by dre studio resolution. Many manufacturers prefer to call the CD audio format "lossless," and the higher sampling rate than the CD format is called "high resolution." However, technically, only authentic audio recordings without any modification or adjustment can be called truly "lossless."

However, since the industry has generally given a new definition of "lossless" and "high resolution," we don't have to worry too much about these things. In general, the so-called high resolution audio has an analog frequency response of at least 40 kHz, and the bit depth and sampling of the file must be at least 24-bit 96 kHz. Therefore, many people often refer to high-resolution audio as 24/96. However, you can actually find 24/192 or even 24/384 audio files.

We just mentioned bit depth and sampling rate. What do they mean? Let's start with bit depth. The bit depth is used to define the so-called dynamic range, or more simply, the difference between the loudest sound and the lightest sound. Each "bit" represents 6dB (decibels) in the dynamic range, so 16-bit depth means that the dynamic range is 96dB, and the same 24 bits depth is 144dB.

Undoubtedly, the larger the dynamic range is, the better, because the greater the difference between the two extremes of sound loudness, it means that when people listen to some music, especially classical music, they can experience more emotional ups and downs - of course This requires the support of the playback device.

Then let's talk about the sampling rate. Analog audio is represented by a waveform, so when it is converted to a digital signal, a microphone samples it at regular intervals. The sampling frequency is the sampling rate. For example, 1 Hz means sampling once every second.

Because at least two samplings result in beats by dre studio a waveform, this means that to restore a 40 kHz high resolution signal, the required sampling rate is at least 80 kHz. It is worth mentioning that CD audio is generally 16-bit/44.1 kHz. We only need to know that the sampling rate represents the amount of information in the audio. High-resolution music is initially stored as a DSD file on a DVD-A or SACD disc. Only some devices that support this type of media can play it. Interestingly, Sony's UBP-X800 Blu-ray player is also capable of playing SACD.

It is worth mentioning that considering the huge size of high-resolution audio and the now faster and faster internet speed, this type of music has now gradually turned to network downloads, not just mere disc carriers. In terms of streaming media services, some foreign platforms are now offering high-resolution listening, but it is a pity that streaming services such as Apple and Amazon have not provided high-resolution streaming.

As for lossless music, its threshold is much lower. However, because such formats require the playback device to have the ability to decode files, not all electronic devices capable of playing audio support lossless formats. So many times, you can only see the lossless audio support on a dedicated player, or a handful of smartphones that sell on music.