Web Audio API by Boris Smus
Author:Boris Smus
Language: eng
Format: epub
Tags: COMPUTERS / Digital Media / Audio
ISBN: 9781449332631
Publisher: O’Reilly Media
Published: 2013-03-10T16:00:00+00:00
theory: Understanding Dynamic Range
In audio, dynamic range refers to the difference between the loudest and quietest parts of a sound. The amount of dynamic range in musical pieces varies greatly depending on genre. Classical music has large dynamic range and often features very quiet sections followed by relatively loud ones. Many popular genres like rock and electronica tend to have a small dynamic range, and are uniformly loud because of an apparent competition (known pejoratively as the “Loudness War”) to increase the loudness of tracks to meet consumer demands. This uniform loudness is generally achieved by using dynamic range compression.
That said, there are many legitimate uses of compression. Sometimes recorded music has such a large dynamic range that there are sections that sound so quiet or loud that the listener constantly needs to have a finger on the volume knob. Compression can quiet down the loud parts while making the quiet parts audible. Figure 3-6 illustrates a waveform (above), and then the same waveform with compression applied (below). You can see that the sound is louder overall, and there is less variance in the amplitude.
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