Hey Sp Community,
When I bought my SP-555 I had heard that you could use it with Reason. Other then have the SP function as a midi controller are there any other possibilities?

You can use 555 as audio interface for reason via USB.
If you used only onboard/integrated soundcard it will be a big step forward. Offcourse you can samle from reason to your 555's pads. Reason sounds preety good trough 555 imo.