The short message on my q3 mobile phone doesn't ring.

When the mobile phone turns off the ringtone, there is no ringtone prompt for text messages and phone calls.

At present, the music format mp3 on the Internet is the most common. mp3 bits can reduce the sound distortion by adopting a coding algorithm called "perceptual coding technology": when coding, firstly, the frequency spectrum of the audio file is analyzed, then the noise frequency is filtered by a filter, and then the remaining bits are quantized and scattered, and finally an mp3 file with high compression ratio is formed. The compressed file can achieve a sound effect closer to the original sound source when playing back. Although it is a kind of lossy compression, its biggest advantage is that it has a high compression ratio with minimal sound distortion.