AUDIO FADING


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BACKGROUND
The Planet written by Gustav Holst between 1914 and 1916, was the first piece of music in that era to have an audio fading. We use this technique because the imagination knew no difference between sound and silence. Fade-in and fade-out are cinematic devices that begin and end scene. The term 'fade-out' itself is of cinematic origin, appearing in print around 1918.

THEORY
• A FADE is a gradual increase or decrease in the level of an audio signal. A recorded song may be gradually reduced to silence at its end are called Fade-out, or may gradually increase from silence at the beginning is called Fade-in.
• A fader is a device used for fading, especially when it is a knob or button that slides along a track or slot.
• A crossfader on a dj mixer essentially functions like two faders connected side-by-side, but in opposite directions. It allows a DJ to fade one source out while fading another source in at the same time.
• On a mixer with auxiliary send mixes, the send mixes are configured pre-fader or post-fader.

Application
• Fade-in Fade-out is used to increase gradually, as vision or sound in a film or broadcast.
• To lose brightness, loudness, or brilliance gradually dim.
• Fade-in used as a periodic reduction in the received strength of a radio transmission.
• Modern high end digital mixers often have piezo-electric actuators attached to the faders such that they can be multi-use and will jump to the correct position for the selected function and/or saved setting.