Tag: audio file formats in multimedia ppt

[Music] File format types


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[Music] File format types

Music File Formats

Does everyone like music?

digital-formats

I think many people enjoy music downloading or streaming instead of CD these days, but what kind of format is music stored as data?

I researched the differences, advantages, and disadvantages of each format.

Types of audio compression

For music file format

Uncompressed
Lossy compression
Lossless compression
There are three types:
File-based compression can reduce file size and reduce download time and storage capacity.
Uncompressed format
As the name implies, it is an uncompressed file. The point is the original data.

The most used formats are:

Wav
AIFF
The advantage is the accuracy of the data. However, it also has the disadvantage of a large file size and uses approximately 10MB for a 1 minute audio file.

It is common to use “WAV” for Windows and “AIFF” for Macintosh.

WAV (WAVE)
A standard Windows audio file format established by Microsoft and IBM, also known as the WAVE format.

It is generally uncompressed and has good sound quality, but it is a very large file.

WAV format files are converted to AAC / MP3 format when imported into iTunes. You can specify compression for WAV, but there seem to be not many usage examples.

AIFF (Audio Interchange File Format)
This is a standard Macintosh audio file format established by Apple Inc. Like WAV, it is not compressed and has good sound quality, but it is a very large file. There is also AIFC, an extended format with lossy compression.


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Audio file formats

It all starts with Pulse Code Modulation (PCM), the basis for digital audio, which was founded in 1937 and is characterized by two properties: sampling rate for measuring the waveform amplitude and bit depth for measuring possible digital values.

Examples of digital formats for audio sampling are:

– WAV (waveform audio file format)

– MP3, AAC, WMA, Vorbis

– FLAC (Free Lossless Audio Codec) ALAC (Apple Lossless Audio Codec) and APE

WAV:

The same format is used to record audio CDs. Different qualities are available (8-16 bit, 11 to 44 kHz). The higher the quality, the greater the memory usage.

MP3, AAC:

The files. MP3 and AAC are the most common formats when you need to store music on a computer or phone, and exchange or download music on the network and on the Internet. MP3 is a “lossy” format that loses some audio quality to achieve a significant increase in file size. An MP3 has a size of approximately 1 MB per minute.
The difference to lossless formats is that if you convert the file to a less compressed format like WAV, the quality sacrificed during compression will not be restored. For lossy formats such as MP3, the audio quality is measured using the bit rate value, which is generally specified in “192 kbit / s” or “192 kbit / s”.
The higher the bit rate, the more detailed the sound becomes.

FLAC, ALAC, APE:

These formats compress audio using algorithms.
The difference between compressed files and FLAC is that FLAC is specifically designed for audio and therefore has better compression rates without data loss.
As a rule, a .FLAC takes up half of the storage space of a WAV in megabytes and maintains the “CD quality”.
A FLAC can be converted to WAV without loss of quality and is the preferred format for those who want to listen to music with the best quality and great speakers.

Is the audio quality subjective?

In theory no, but in practice it’s very subjective.
To hear real differences between the quality of an audio CD and an MP3 file, you need to use high-end headphones or speakers.
In addition, it also depends on what you are listening to and what type of music, in different formats, can have significant or almost no differences in listening.
If you are looking for the best compromise between file size and quality, you should experiment with the different formats and test whether you have a better experience with MP3 with higher bit rates or even with the playback of FLAC files.