Off spin Indian spin quartet - E. A. S. Prasanna and Srinivas Venkataraghavan, also Harbhajan Singh and Ravichandran Ashwin of India, Saqlain Mushtaq and Saeed Ajmal of Pakistan, Jim Laker and Graeme Swann of England. Saqlain Mushtaq was credited with the invention of the "doosra", which is bowled with a similar-looking action to the off break but spins the opposite way, just as the leg spinner's googly turns the opposite way from his stock ball. Off spin Off spin is a type of finger spin bowling in the sport of cricket. A bowler who uses this technique is called an off spinner.
Square wave in very sensitive circuits such as precision analog-to-digital converters, sine waves are used instead of square waves as timing references. In musical terms, they are often described as sounding hollow, and are therefore used as the basis for wind instrument sounds created using subtractive synthesis. Additionally, the distortion effect used on electric guitars clips the outermost regions of the waveform, causing it to increasingly resemble a square wave as more distortion is applied. Simple two-level Rademacher functions are square waves. The square wave in mathematics has many definitions, which are equivalent except at the discontinuities: It can be defined as