Sound Studio II/Pro II do not generate sound. They simply map MIDI data to a synthesizer. In most cases this synthesizer will be a GM synth on your soundcard. The instrument soundsets such as the Korg Trinity are simply lists of sounds that makes things easy if you own a Korg Trinity. If you do not have the output of Sound Studio mapped to a Korg Trinity and you are using this sound set. You will hear the standard GM sounds of your Soundcard.