You don't NEED but CAN! First of all, I would make sure that the clock settings on your BSP are configured correctly. You can access the clock settings by pressing the "Utility" button on the BSP and navigating through the menu options. Secondly, I would recommend using an attenuator or VCA. If the clock signal is still too rapid even after setting the lowest BPM value on the BSP, you can use an attenuator or voltage-controlled amplifier (VCA) module in your Eurorack setup. This will allow you to scale down the incoming clock signal to a slower speed that suits your needs.