A lot of other emulators have the ability to buffer or delay inputs by a variable unit of time specifically for the benefit of rhythm games. I noticed a lot of issues on Space Channel 5 and many people over the years have vocalized difficulties with the inputs timings on this title which I believe may effect other rhythm game titles on the dreamcast and would be alleviated it this feature existed to aid games like Space Channel 5 that have no in-game option to adjust or accommodate for delay.