In the Effects page of the onboard mixer of the T4, there is an option to dial in reverb and chorus for multipads. It works well for Tyros preset sounds, but when I record Multipads using my own UVN samples, the reverb disappears.

Any ideas?

Chony, I guess you can re-record your samples with reverb/chorus....or can you route the pads out the separate outs and back into the audio input..then add effects...I am not sure the Tyros4 can do...the suggestion is from my experience with the G70 (Roland)..