Compressor; Enhancer; Problems , Possible Causes , Solutions; Noise /Hiss Buildup - dbx 286A Manual De Instrucciones

Mic Preamp/
Processor
286A
¥Compressor
Note: The Compressor is OFF when the Compressor DRIVE is set to the "off" position.
Suggested Initial Compressor settings:
Smoothing Out A Vocal
Performance
Fattening a Kick Drum or Snare Drum
P , P
ROBLEMS OSSIBLE
Noise Rushups, Hiss Buildup
C , S
AUSES OLUTIONS
Always verify that the problem is not in the source material being fed into the 286A,
or in the other parts of the system. If you still have problems when using the 286A,
consider the following remedies.
Higher DRIVE settings on the compressor often add gain to the signal. If the signal
already has substantial hiss, the compression can actually increase the hiss. As a
compressor releases and the gain of the input signal increases, background noise and
hiss can increase. This is called noise rushup. Remedy this by using compression
conservatively. Also, to reduce noise rushups, especially during pauses, lower the
Compressor DENSITY setting. For both cases, set the Expander/Gate to match the
compressorÕs release time, thereby gating out the noise or hiss as much as possible
without truncating the signal.
Increased hiss can also result from high frequency Òdetailing.Ó The HF DETAIL
enhancer estimates how much high frequency boost is appropriate for a given input
signal. If the signal is dull but noisy (e.g., vocals recorded to a bad cassette), the HF
DETAIL will make it brighter and can pull up hiss to objectionable levels. (The hiss
will often be audibly modulated by the material because the HF DETAIL is adaptive
to the material.) Reduce the setting of the HF DETAIL control until the effect is no
longer objectionable.
dbx Professional Products manufactures several processors that are more suitable for
this type of low-quality material because they have built-in dynamic single-ended
noise reduction circuits. The dbx Project 1 296 Spectral Enhancer features hiss
reduction and Spectral Enhancement all in one unit. The dbx 563X and 929
ÒSilencersÓ provide over 30dB of hiss reduction only.
Raising a Signal Out of a Mix
Adding Sustain to Guitar or
Synthesizer String Sounds
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