Question

which option is used to change the format of the song​

Answer 1

Explanation:

Select one of the options from the popup menu. Now when you return to the form, the new formatting should be applied.

Answer 2

You can use the Apple Music app on Mac or iTunes for Windows to convert song format files between compressed and uncompressed formats. For example, you might want to import some uncompressed files into your music library as compressed files to save disk space. Examples of compressed formats are MP3 and Apple Lossless Encoder. Examples of uncompressed formats are AIFF or WAV.

You shouldn't notice reduced sound quality when you: 

Convert between uncompressed formats

Go from a compressed to an uncompressed format

You might notice reduced sound quality when you:

Convert between compressed formats

Go from an uncompressed to a compressed formatYou might not hear a difference between a compressed and uncompressed song. This can depend on the song, your speakers or headphones, or your music device.

If you compress a song and it loses data, you can't uncompress it to retrieve the data. If you convert a song from a compressed to an uncompressed format, its quality doesn't improve. The file only takes up more disk space. An example is when you convert a song in MP3 format (a compressed format) to AIFF (an uncompressed format). The song takes up much more space on your hard disk, but sounds the same as the compressed file. To take advantage of uncompressed formats, you should import songs in these formats.