TunesKit provides free trial version for all users to free try before buy. You can download and install the application at first. Something different between trial version and full version is that users can only convert 1 minute for each spotify track with the trial version.
Run Spotify app on your computer, then find the songs or playlist you want to convert after login with your account. Copy and paste the track URL to the box, then click 'plus' icon to add the Spotify track to main interface.
You are allowed to customize the output settings for converting Spotify songs. Just click the dropdown menu on the top-right corner, then choose "Preferences", and you can set output format, Channel, Bitrate and sample rate.
After all set well, you can click "Convert" button to start converting Spotify music to MP3 or other common audio format now.
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