Alesis 3630 Air Compressor User Manual


 
Noise Gate Meter (Open or Closed)
When the noise gate is closed (i.e., the input signal is below the noise
gate threshold), the red Close LED is lit. When the noise gate is open
and letting through the input (i.e., the input signal is above the noise
gate threshold), the green Open LED is lit. The red Close LED fades
from on to off over the time set by the noise gate Rate control.
Since either the Open or Close LED will be on at all times, these also
serve as power-on indicators.
1.8 SIDE CHAIN APPLICATIONS
The side chain jack allows for two useful functions:
• "Keying" one signal with another, so that the dynamics of one signal
depend on the dynamics of a second signal
• Frequency-dependent limiting, so that limiting is triggered only by
certain frequencies.
The side chain jack is a stereo jack, where the ring connection sends the
3630's control signal for processing, and the tip connection receives the
processed sound. For keying applications, a regular mono cord can be
used since it is not necessary to send the 3630's control signal out for
processing. For frequency-dependent limiting applications that in-
volve plugging into another signal processor, a special stereo-to-dual-
mono cord is required, as shown below.
Mono send
to EQ (ring)
Mono return
from EQ (tip)
Stereo Insert
(to 3630 sidechain)
Tip
Ring
Sleeve
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