Looking at the resolution, 320kps (this unit is 0 0) or above is the best sound quality, followed by 224, 192, 128, 64.

Looking at the size, generally 320 music is about 9M, while 128 and 192 music are generally only about 3 or 4M.

However, the ones obtained from Baidu are generally 128 and 192. It is recommended to download Sogou Music Box or Qianqian or something. You can use that download to find a high-quality version.

Of course, good sound quality also takes up a lot of space - -

I mentioned using Sogou Music Box to download - - there is an option to default to the best sound quality. Generally, what it downloads is directly transferred from CD, with 320 or 224 sound quality.

The Goethe SR60 headphones are recommended at this price. They are great for pop and rock. The price-performance ratio is the king at this price, 600 yuan. For slightly cheaper, there are Sennheiser's px200 and Goethe's igrado, which cost around 400 yuan.

If you listen to a lot of light music, the akg530 is about 600 yuan, and the high frequency is very powerful. There is also akg420 which is cheaper. The price is around 400

Hope this can help you