What synthesizers did Mitsuda use for the Chrono Trigger and Chrono Cross soundtracks? Did he ever say publicly what they were, as well as what brand(s) his acoustic instruments were (especially the bouzouki)? Uematsu might have used the same instruments for his contributions as well, or Mitsuda borrowed Uematsu's, who knows.
I remember hearing the clinking loop from CT 2300AD on a Yamaha (I think it was a lower-end keyboard like one of the PSS series), and the pipe hit echo loop from CC Chronopolis on another (might have been a higher-end Roland or even a Korg Triton).