 Controllerism is also a nod to traditional musicianship and instrumental-ism paired with modern computer sequencing software such as Ableton Live and Native Instruments Traktor.However a working knowledge of scales and chords is not necessarily required as the performers typically focus their efforts more on sequencing events, software effect and instrument manipulations using buttons, knobs, faders, keys, foot switches and pedals than on instrumental notes played in real time.With recent developments in music technology, particularly in software instruments, a USB MIDI controller enables musicians almost unlimited possibilities to control a wide variety of sound types.