Lossless music in flac format is the best.

Lossless music format:

1. The 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 used by Windows platforms and Its applications are widely supported. 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. Therefore, the sound quality of WAV is almost the same as that of CD, but the WAV format requires too much storage space. It is very inconvenient to communicate and disseminate.

2. APE is one of the popular digital music file formats. APE is a lossless compression audio technology, which means that after you compress the audio data files read from the audio CD into APE format, you can also restore the APE format files, and the restored audio files are the same as the compressed audio files. It's exactly the same as before, no loss.

3.

FLAC is the abbreviation of Free Lossless Audio Codec, which can be interpreted as lossless audio compression coding in Chinese. FLAC is a well-known set of free audio compression codes, which is characterized by lossless compression. Unlike other lossy compression codes such as MP3 and AAC, it does not destroy any original audio information, so it can restore the sound quality of music CDs. It has been supported by many software and hardware audio products since 2012.

FLAC is similar to MP3, but it is lossless compression, which means that audio will not lose any information when compressed in FLAC. This compression method is similar to Zip, but FLAC will give you a larger compression ratio, because FLAC is a compression method specially designed for the characteristics of audio, and you can use the player to play FLAC compressed files just like you normally play them. MP3 files (there are already many car players and home audio equipment that support FLAC, and you can find links to the manufacturers of these equipment on the FLAC website).

4. WavPack is a free, open source lossless audio compression format developed by David Bryant. WavPack allows users to compress and restore WAV format audio files represented by 8, 16, 24 and 32-bit floating point. In addition, it supports multi-channel data streaming and very high sample rates. Like other lossless compression mechanisms, the compression ratio of this algorithm also varies with the source data, but it is usually between 30% and 70% for ordinary pop music, and for classical music and other music ranges. Broader music usually gives better results.

5.

ALAC-Apple Lossless Audio Codec is a lossless audio codec solution developed by Apple.

One of the reversible compression formats for voice data developed by Apple. It can be used starting from iTunes 4.5 released in April 2004, and can be played on iPod, etc.

6. SAVD

Super Audio CD, the abbreviation of Super Audio CD, is a MMCD (single-sided double-layer structure high-density optical disc) jointly developed by Sony and Philips. A new digital audio format developed and launched based on Its frequency range and dynamic range are both better than CD. SACD is a new type of optical disc. It is not a CD format, but is similar to a DVD disc. When playing, you need to use SACD-specific playback equipment.