Record both the phonograph and the gramophone is as follows: they spoke to the funnel, the air inside it vibrate causing the elastic membrane to vibrate, and the needle to various irregularities in the channel drawn. This writing is mechanically sound, which can then be read by the sensor and played through the funnel device. Using now vhs to dvd you can save any movie in to a digital copy.
The first attempts to combine audio with Edison’s film still belongs. He wants to combine, and he manages the phonograph with kinetoscop (a machine that can see individual videos about 30 seconds), calling the new device kinetophon.
For film sound system, the hardest thing is perfect synchronization between character and mimic speech sound heard. A prerequisite is the projection of the film cadence, which leads to a constant speed of the film in the transducer.

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