SurferEQ 2 Boogie features 3 bands, two of which can be switched to Shelf mode, while the centre band can be switched between Surfing and static mode. Surfing mode tracks the pitch of a monophonic instrument or a vocal source and can adapt its bands' frequencies relative to the music in real-time, maintaining the natural harmonic balance of the sound source and making it possible to shape the source's timbre relative to the notes being played.

Info: https://global.focusrite.com/plugin-collective