1. We can use cool dog music to realize this function. We click More on the left and select format conversion.

2. Then click Add Local File in the pop-up window, as shown in the figure

3. To compress the song file size, we only need to click the option bar as shown in the figure, and then choose the file size according to our own needs, such as 8kbps. Generally speaking, the smaller the number, the smaller the file size, and of course the worse the sound quality.

4. Then, we can click to convert the file, which is very convenient and quick.

Expanding the data:

Music format takes up memory:

MPEG and OGG are lossy compression. If the compressed data is restored, the data is actually different. Of course, the human ear is indistinguishable. Therefore, if MP3 and OGG formats are restored from the compressed state, losses will occur.

however, even if the APE and FLAC formats are restored, the original sound quality can be preserved without loss. Therefore, APE and FLAC can be compressed and restored without loss of treble texture. On the premise of completely maintaining the sound quality, the compression capacity of APE has been appropriately reduced.

there are three lossless formats: ape, wav and flac, and aac can only be considered as high quality. Advantages and disadvantages: All lossless formats are essentially wav compression, and will be returned to wav when playing. Therefore, playing wav directly helps to save memory and is smoother. But the disadvantage is that the file is too large, generally more than 3 megabytes. Ape and flac are relatively small.

as the standard of digital music file format, WAV format is too large, so it is inconvenient to use. Therefore, we usually compress it into MP3 or WMA format. Compression methods include lossless compression and lossy compression.