CM101S+ C-Media Electronics, Inc., CM101S+ Datasheet - Page 15

• Manufacturer Part Number: CM101S+
• Description: USB 2CH Audio Controller
• Manufacturer: C-Media Electronics, Inc.

CM101S+ include a new feature called Dynamic Range Control (DRC), and with a default ON
setting (Users can still turn it off within the Windows audio advance control panel)
Dynamic range is defined as the difference, in decibels (dB), between the loudest and quietest
sounds in any particular piece of audio content. Classical music is a good example, with ranges
from piano (soft) to forte to FFF (for extremely loud). Movies also typically have a wide dynamic
range, which may cause you to have to turn the volume up and down as scenes change. For
example, when watching a movie at home, you may be forced to turn up volume to hear the
dialog in a quiet scene, and then quickly turn it down again during a car chase scene that follows.
In this way, there may be times in a home theater environment when it would be useful to be able
to control the dynamic range.
With Dynamic Range Control enabled, the full dynamic range (A) of the program is reduced (B).
Date: 09/25/2005
6.3 DYNAMIC RANGE CONTROL (DRC)
A
Peaks Clipped
+10dB
+20dB
-10dB
-20dB
-30dB
-40dB
-50dB
-60dB
hard to heard
Lower Levels
0dB
A
DRC
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USB Audio With Dolby Digital Live Solution
Lower Levels Raised
Peaks Reduced
B
Peaks Reduced
B
Lower Levels Raised
Version: 1.01
CM101S+