I have the old Lyra (1 ?) and recognized some days a little delay pressing the keys when I played Slamtilt. Thought it could be the problem playing it on an DLP projector but having a Cinemateq scaler between the A1200 and the projector.
I think I have to try it once without the scaler and once also on the old Philips CM 8833 to be sure Lyra is the reason for this problem.