Mixing kick drums and 808s for the best sound requires wise sound selection (short-tailed kicks), and often sidechain compression to reduce volume automatically, and avoid low-end frequency clashing.
Learn how to slide 808s in FL Studio with slide notes, portamento and mono. Also known as gliding notes.. and popular with basslines and melodies, too!
An 808 is originally from a Roland TR-808 Drum Machine, but has evolved tremendously over the years. It is a hybrid of a kick drum and bassline in one sound, and is absolutely necessary to master to become a good beatmaker.