Many of the sound effects created for later programmes featured innovative production techniques borrowed from the realm of "musique concrète", and using the then new technology of magnetic tape. Many of these sequences involved the use of complex multiple edits, echo and reverberation and the deliberate slowing down, speeding up or reversing of tapes. One of the most famous was the legendary "Bloodnok's Stomach" sound effect, created by the BBC Radiophonic Workshop to represent the sound of Major Bloodnok's digestive system in action, which included a variety of inexplicable gurgling and explosive noises. Lewis (1995, p. 218) states Bloodnok's stomach "was achieved by overlaying burps, whoops from oscillators, water splashes, cork-like pops, and light artillery blasts".