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Waveform Audio File Format (WAVE, or WAV due to its filename extension; pronounced / w æ v / or / w eɪ v /) is an audio file format standard for storing an audio bitstream on personal computers. The format was developed and published for the first time in 1991
Wave editors are digital audio editors. There are many sources of software available to perform this function. Most can edit music, apply effects and filters, and adjust stereo channels .
WAV and AIFF are designed to store a wide variety of audio formats, lossless and lossy; they just add a small, metadata -containing header before the audio data to declare the format of the audio data, such as LPCM with a particular sample rate, bit depth, endianness and number of channels.
There are a number of free sound effects resources of public domain or free content sound recordings appropriate for Wikipedia use available online, and as well as in other contexts. All files should be converted to ogg, Wikipedia's patent-free format of choice.
In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
About 68% of values drawn from a normal distribution are within one standard deviation σ away from the mean; about 95% of the values lie within two standard deviations; and about 99.7% are within three standard deviations. [6] This fact is known as the 68–95–99.7 (empirical) rule, or the 3-sigma rule .
Photons are massless particles that always move at the speed of light measured in vacuum. The photon belongs to the class of boson particles. As with other elementary particles, photons are best explained by quantum mechanics and exhibit wave–particle duality, their behavior featuring properties of both waves and particles. [2] .
