Spotify's new playlist tool allows you to adjust multiple parameters, or match tempo and key, to blend tracks smoothly.

You've already got the perfect playlist, now Spotify lets you add and customize transitions between songs. On Tuesday, Spotify launched a beta version for Premium users to add song transitions. There's now a mix button in the playlist toolbar that lets you mix songs for a seamless transition.

Ever wished for smooth, on-point song transitions in your music streaming playlists customized to your liking? Spotify is rolling out a new beta feature for Premium subscribers globally that lets you add tailor-made transitions between songs,