Does anybody know of recent-ish software or hardware projects that implements the live note-level (pre-synthesis) manipulation seen in lft's amazing "bitbuf"[1]

Does anybody know of recent-ish software or hardware projects that implements the live note-level (pre-synthesis) manipulation seen in lft's amazing "bitbuf"[1] device? In the presentation video[2] at 3:26, lft describes how the "bass tracks" are "transposable". After entering a bass part in the key of C, playing single notes transposes the note values up to that key (i.e. playing D transposes all note values in the bass part by +2 semitones). This type of transformation happening live, at the MIDI/note level is the goal. Sunvox[3] can do something similar using pre-defined arps in a metasynth, but Sunvox is primarily a tracker, and isn't really focused on playing live. In an ideal world, I want to be able to do live loop recording/overdubbing akin to my Line6 DL4, but at the MIDI/note level where the entire loop can transpose as needed (or even harmonically transform to a new chord?! whatever that means?) lft's "bitbuf" hits a really unique - and mostly unexplored - idea of live MIDI transformation, where existing loop information doesn't have to be static... [1] https://www.linusakesson.net/bitbuf/index.php https://www.linusakesson.net/bitbuf/index.php [2] ibid, lft_bitbuf_presentation.avi [3] https://warmplace.ru/soft/sunvox https://warmplace.ru/soft/sunvox