There are many types of music file formats. I think no matter what format, maintaining the best sound quality is the most important. Our commonly used CDs and mp3s can basically meet the requirements. The most commonly used format now is mp3, which has relatively good overall performance.

1. WAV format is a sound file format developed by Microsoft. It is also called a waveform sound file. It is the earliest digital audio format and is widely supported by Windows platforms and their applications. The WAV format supports many compression algorithms, multiple audio bits, sampling frequencies and channels. It uses a sampling frequency of 44.1kHz and 16 quantization bits. Like CD, it requires too much storage space to facilitate communication and dissemination.

2. MIDI is the abbreviation of Musical Instrument Digital Interface, also known as Musical Instrument Digital Interface. It is a unified international standard for digital music/electronic synthetic instruments. It defines the way in which computer music programs, digital synthesizers and other electronic equipment exchange music signals. It stipulates the data transmission protocol between cables and hardware and equipment connecting electronic musical instruments and computers from different manufacturers, and can simulate the sounds of multiple musical instruments. MIDI files are files in MIDI format, and some instructions are stored in MIDI files. Send these instructions to the sound card, and the sound card will synthesize the sound according to the instructions.

3. Everyone is familiar with the CD music format. The extension is CDA. Its sampling frequency is 44.1kHz and 16 quantization bits. It is the same as WAV, but CD storage uses the form of audio tracks. , also called the "Red Book" format, records waveform streams and is an approximately lossless format.

4. The full name of MP3 is MPEG-1 Audio Layer 3, which was merged into the MPEG specification in 1992. MP3 can compress digital audio files with high quality and low sampling rate. In other words, audio files (mainly large files, such as WAV files) can be compressed to a smaller level with very little sound quality loss (the human ear cannot detect this sound quality loss at all).

5. MP3Pro was developed by the Swedish Coding Technology Company. It contains two major technologies: one is the unique decoding technology from Coding Technology Company, and the other is the French Tom, the MP3 patent holder. A decoding technology jointly researched by Sen Multimedia Company and the German Fraunhofer Integrated Circuit Association. MP3Pro can improve the original MP3 music sound quality without basically changing the file size. It can compress audio files at a lower bit rate while maintaining the pre-compression sound quality to the greatest extent.

6. WMA (Windows Media Audio) is Microsoft's masterpiece in the field of Internet audio and video. The WMA format achieves a higher compression rate by reducing data traffic but maintaining sound quality. Its compression rate can generally reach 1:18. In addition, WMA can also prevent copying through DRM (Digital Rights Management) solutions, or add restrictions on playback time and playback times, or even restrictions on playback machines, which can effectively prevent piracy.

7. MP4 uses a2b music compression technology with "perceptual coding" as the key technology developed by AT&T and jointly announced by GMO and RIAA. A new music format. MP4 uses copyright-protecting encoding technology in the file. Only specific users can play it, effectively ensuring the legality of music copyright. In addition, the compression ratio of MP4 reaches 1:15, which is smaller than MP3, but the sound quality is not degraded. However, because only specific users can play this file, its spread is far behind that of MP3.

8. SACD (SA=SuperAudio) is officially released by Sony. Its sampling rate is 64 times that of the CD format, which is 2.8224MHz. The SACD playback frequency bandwidth reaches 100kHz, which is 5 times that of the CD format. The 24-bit quantization bit is far more than that of the CD, and the sound details are richer and clearer.

9. QuickTime is a digital streaming media launched by Apple in 1991. It is oriented to video editing, Web website creation and media technology platforms. QuickTime supports almost all mainstream personal computing platforms and can be accessed through the Internet. Provides real-time digital information flow, workflow and file playback functions. The existing versions are QuickTime 1.0, 2.0, 3.0, 4.0 and 5.0. Version 5.0 also incorporates many new technologies such as players that support the highest A/V playback quality.