sentences:  This way, CDJs can be used to control DJ software without playing a timecode signal into a sound card.In 2010, Native Instruments released the Traktor Kontrol S4, which used high resolution jog wheels and a proprietary protocol rather than MIDI to achieve better performance of the jog wheels.The Mk2 of the Kontrol S4, released in 2013, uses standard HID signals rather than a proprietary protocol to communicate with the computer.