The sound source is MP3, CD, DVD-AUDIO, SACD, Blu-Ray, etc. These have special players, among which SACD, DVD, AUDIO and Blu-Ray (Blu-ray) are the best, with specifications of 24bit and 192khz.
Each of the above formats has special machines and software. MP3 is too low-end, and CD is 16bit. In theory, it can store 20-20000 hz, which conforms to the highest experience index of the human ear. But at present, this format is too backward, especially the high frequency part.
DVD-AUDIO, SACD and Blu-Ray are currently the highest formats, reaching 24bit, 96khz or 192khz, covering 10-50000 hz.
The SACD machine is now very popular. At present, the big brands with good sound are Japanese esoteric.
