Vari-speeding sound allows an audio engineer to deviate from (or to) a standard speed. It is the process of changing the speed of an audio track to match the speed of another audio track or video source. Vari-speeding is often used to correct speed variations due to rate conversion or
Modulating hiss refers to noise levels that noticeably rise and fall with program level. For example, a common occurrence of modulating hiss can be heard when noise levels rise around each spoken word of dialogue in a soundtrack.
The Academy curve is a standard playback equalization curve for pre-1975 mono, non-Dolby® optical soundtracks. It functions as the second part of a noise reduction scheme that begins by adding a “pre-emphasis” to audio intended for theatrical playback by boosting its high frequencies. When