This is an Audio DSP chip from the early 90’s, used for sound effects in audio mixing consoles. Unfortunately I couldn’t find much info on these.
The die is massive, 10mm square at least. Interestingly, the markings on the die indicate it’s a TMS67002, maybe there was a different internal software version for the 57002 with fewer features, that used the same Silicon? In the centre of this die, there’s an area that looks like mask ROM, with the individual memory bits visible.
