Picking Song Quality Levels

After you select a format, you decide the quality with which the music will be encoded. Higher quality levels mean better-sounding music, but larger file sizes. If file size is not a problem, then choosing a higher quality setting is the way to go. If you have relatively little disk space, you might want to experiment to see which is the lowest quality setting you can choose that results in music that still sounds good to you.
Note that when it comes to music, quality is in the ear of the beholder. Also, it heavily depends on the type of music you listen to as well as how you listen to it. For example, if you listen to heavy metal rock using a low-quality pair of speakers (in other words, cheap speakers), quality will be less of an issue for you because you likely won’t hear any difference anyway. However, if you listen to classical music on high-quality speakers, the differences in quality levels will likely be more noticeable.
The trade-off for quality is always file size. The higher the quality setting you choose, the larger the resulting files will be. If you don’t have disk space limitations and have a discriminating ear, you might want to stick with the highest possible quality setting. If disk space is at a premium for you, then consider using a lower quality setting if you can’t detect the difference or if that difference doesn’t bother you.