The Dickson Experimental Sound Film is a film made by William Dickson in late 1894 or early 1895. It is the first known film with live-recorded sound and appears to be the first motion picture made for the Kinetophone, the proto-sound-film system developed by Dickson and Thomas Edison. (The Kinetophone, consisting of a Kinetoscope accompanied by a cylinder-playing phonograph, was not a true sound-film system, for there was no attempt to synchronize picture and sound throughout playback.) The film was produced at the "Black Maria", Edison's New Jersey film studio. There is no evidence that it was ever exhibited in its original format. In 2003, The Dickson Experimental Sound Film was included in the annual selection of 25 motion pictures added to the National Film Registry of the Library of Congress. being deemed "culturally, historically, or aesthetically significant" and recommended for preservation. Synopsis The film features Dickson playing a violin into a recording horn for an off-camera wax cylinder. The melody is from a barcarolle, "Song of the Cabin Boy", from Les Cloches de Corneville (literally...

An expression pedal is an important control found on many musical instruments including organs, electronic keyboards, and pedal steel guitar. The musician uses the pedal to control different aspects of the sound, commonly volume. Separate expression pedals can often be added to a guitar amplifier or effects unit and used to control many different aspects of the tone. Because the source of power with a pipe organ and electronic organs is not generated by the organist, the volume of these instruments has no relationship with how hard its keys or pedals are struck; i.e., the organ produces the same volume whether the key or pedal is depressed gently or firmly. Moreover, the tone will remain constant in pitch, volume, and timbre until the key or pedal is lifted, at which point the sound stops. The expression pedal gives the organist control over the external source of power, and thus the volume, of the instrument, while leaving the user's hands free. This system of dynamic control is completely distinct from the act of adding stops (in the case of pipe organs) or pulling more drawbars (in the case of organs and synthesizers). Furthermore, the expression pedal can...

An infinite regress is an infinite series of entities governed by a recursive principle that determines how each entity in the series depends on or is produced by its predecessor. In the epistemic regress, for example, a belief is justified because it is based on another belief that is justified. But this other belief is itself in need of one more justified belief for itself to be justified and so on. An infinite regress argument is an argument against a theory based on the fact that this theory leads to an infinite regress. For such an argument to be successful, it has to demonstrate not just that the theory in question entails an infinite regress but also that this regress is vicious. There are different ways in which a regress can be vicious. The most serious form of viciousness involves a contradiction in the form of metaphysical impossibility. Other forms occur when the infinite regress is responsible for the theory in question being implausible or for its failure to solve the problem it was formulated to solve. Traditionally, it was often assumed without much argument that each infinite regress is vicious but this assumption has been put into question...

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