Miui recalls only mp3 players.

Miui recalled only mp3 for the following reasons:

1, Compatibility: MP3 is a widely used audio format, and almost all devices and software support MP3 format, including different brands and models of mobile phones. Therefore, MIUI chooses to support MP3 format to ensure that total recall files can be played and processed normally on various devices.

2. File size: MP3 is a lossy compressed audio format, which can greatly reduce the size of audio files with almost no obvious loss of sound quality. Compared with other lossless audio formats, such as FLAC or WAV, MP3 files are smaller and occupy less storage space, which is more suitable for the limitation of mobile phone memory.

3. Universality: MP3 is a universal audio format, and most audio resources on the Internet exist in MP3 format. By saving total recall in MP3 format, users can share, transmit and process recording files with others more conveniently. Total recall refers to the process of recording the sound of one or more telephone conversations for later playback, review or recording.