Can you hear the difference?

As far as I known, one of the most lossless audio format is FLAC.  FLAC is short for Free Lossless Audio Codec, one of the most popular lossless audio formats for lossless compression of digital audio.
As for Spotify songs, you can listen to high-quality 320kbps audios offline. But for free users, you can only play lower audios online. 
In order to avoid this hassle, you can use AudFree Spotify Playlist Downloader for Windows to convert Spotify to FLAC with one click no matter you are using a free or paying account. 

My first post here, but I found it interesting that none of the responders so far actually took the test!  I took the test and missed the first one. . . twice!  I finally got it right when there were no other choices.  However, after looking at the accompanying moving graphic for each of the samples, I got the next two correct without listening to the samples.  I just looked for the "fuller" display.  I don't really think the test is all that valid.  I certainly would never listen to that type of music, and it was torture to listen to the first example all the way through, at least twice for all three trial samples.  I did finally try to listen to the other two examples, but stopped before getting half way on the first trial sample of each.  I can certainly hear the difference between lower bit rate mp3 and lossless, the lower the rate, the easier it becomes.  I think most people can't really hear the difference between 320 mp3 and lossless, but that doesn't mean I don't want my classical and jazz streamed in lossless.

FLAC is much closer to lossless quality, but it is not totally lossless. To be honest, I'm used to convert Spotify music with lossless quality from using the tool-Spotify Music Converter for Mac. It is designed for all Spotify free users to convert music to MP3, AAC,etc with lossless quality. After that, you can download Spotify playlist to MP3, play Spotify music on any devices without limitation. It is the best Spotify downloader mac. Hope this tip is useful to you. 

horence

FLAC is much closer to lossless quality, but it is not totally lossless.

FLAC is bit-perfect, no? That would make it lossless.

I'm used to convert Spotify music with lossless quality from using the tool-Spotify Music Converter for Mac. It is designed for all Spotify free users to convert music to MP3, AAC,etc with lossless quality.

MP3 is lossy compression, by definition.

FLAC is lossless

[F]ree [L]ossless [A]udio [C]odec