Later this month, SBTRKT's new single "Hold On" will drop digitally, and today he played a remix of that track on KEXP. Thanks to some on-air clues, Pitchfork hypothesizes that SiSi BakBak is an alias for a certain post-rocking, spastic dancing frontman. Stream the remix, as well as another cut from SBTRKT's forthcoming release, down below. [videoembed size="full_width" alignment="center"][/videoembed] Here's ...