Roland CAKEWALK CA-2A T-Type Leveling Amplifier Guide D'utilisation page 14

• Options menu. The Options menu contains the following options:
• Photocell Memory. The CA-2A T-Type Leveling Amplifier emulates a classic hardware
optical compressor. An optical compressor is different from an FET style compressor, in
that it uses a luminescent panel and photocell to determine the amount of compression,
attack and release times. These controls are not fixed, and are dependent on the
reaction of the photocell, determined by the audio source. The photocell has unique
properties that make optical compressors the prime choice for vocals and other material
with smoother transients. But the hardware is not necessarily perfect. Longer, multi-stage
release times result from high levels of gain-reduction. This will cause the photocell to
"remember" its "on" or "lit" state, for a longer period of time. Attack-times become
snappier as the input becomes more active, and relaxed (slower) during periods of less
activity. After long periods of silence, the compressor can become very sluggish in its
ability to reduce the gain of sudden transients. Under these conditions, the onset of a
new transient can result in a "pop" at the output as the compressor is "waking up". Since
this behavior might not be desirable, we have included the Fast Reset mode to allow a
faster wake-up time, and to avoid the "pop". The Classic mode sticks to the true
emulation and responds like the original hardware. To change the mode, click the
Options menu button
Reset on the pop-up menu.
• External Side-chaining. CA-2A T-Type Leveling Amplifier lets you use a secondary
audio input to control the Gain Reduction control. Sidechaining is typically used with
compressors to limit one signal depending on the signal level of another. Common
applications are to reduce the level of a bass guitar when there is a kick drum, or to
reduce the level of music whenever a speaker talks (often used for background music in
radio- and television programs). Another use for the CA-2A Sidechain inputs is frequency
dependent compression. To enable/disable sidechaining in CA-2A T-Type Leveling
Amplifier, click the Options menu button
choose Enabled or Disabled on the pop-up menu. Please consult your host program's
documentation for information about using sidechain inputs.
• Open Documentation. Opens the CA-2A T-Type Leveling Amplifier User Guide.
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, point to Photocell memory and choose Classic or Fast
, point to External Side-chaining and