Surround, Yes, Type: Full-dot, Back Light: Yes (white), Bluetooth MIDI & Audio: Yes (with optional Wireless MIDI & Audio Adaptor WU-BT10), Yes (Using the USB port): GM level 1 compatible, Touch Response add intensity and rich expression to each note you play, Tone Memory store all your favorite tones and settings for instant recall, Layer Function expand your performance range by layering two tones, Metronome keep time in practice and performance, MIDI Recorder record your performances and play them back, Phones/output jack tuck yourself away from the world around you as you play.
There is also quite a number of layered tones on the CT-S1 that are triggered by polyphony or velocity which a unique feature that is not found on the CT-S400. Follow the music score or piano roll notation at your own pace, with the app guiding you through each step.