 The album was produced using Toshiba-EMI's LMD-649 digital PCM sampler, which engineer Kenji Murata custom-built for YMO .Today, many musicians use digital hardware and software devices to create and modify loops, often in conjunction with various electronic musical effects.A loop can be created by a looper pedal, a device which records the signal from a guitar or other audio source and then plays the recorded passage over and over again .