I am trying to get the sound from Samplitude to play through external speakers. I have a Casio keyboard connected to my laptop via USB, and can play the VSTIs via my keyboard no problem. I also have a Behringer UMC404HD interface connected to the other USB port on my laptop, and the outputs of the interface are connected to my external amplifer/speaker. All other sounds from my laptop, such as Youtube videos, play through the interface and speakers no problem, but for some reason the sound from Samplitude only comes through the laptop's internal speakers. What am I doing wrong, is it just something to do with the audio settings in Samplitude?