21
VINTAGER AC112
90-91 Compressor: Often, the signal level exceeds the headroom of signal-processing devices and therefore
needs to be limited in its dynamic range, so as to avoid distortion. This job is done by compressors and/
or limiters. Limiters abruptly limit the signal above a specific threshold, while compressors provide for a
soft control process over a wider range. With the PARAMETER control you can set the compressor
threshold. EFFECT A determines the compression ratio. EFFECT B allows you to raise the volume to
adapt the compressed signal to the unprocessed one. To achieve optimum adaptation do as follows:
adjust the threshold and ratio as required, then compare the signal levels by switching the effect repeatedly
on and off. Adapt the levels with EFFECT B, so that there will be no audible level difference between
compressed and uncompressed signals. Use this effect to give your guitar longer sustain, or to make
the attack sounds of funky guitar licks (Chicken Scratch) clearly audible, even though the guitar signal
is actually limited in level.
Preset-Nr. Effect Variation PARAMETER EFFECT A EFFECT
B
90 fast Sensitivity Ratio Gain
91 slow Sensitivity Ratio Gain
COMPRESSOR
Tab. 3.23: Parameters of effects 90 and 91
92-93 Expander: All sorts of background noise and hum limit the dynamic range of the wanted signal. As long
as the level of the wanted signal is considerably above the noise floor, background noise is inaudible: the
interference signal is masked by the music. Expanders can be used to efficiently expand the dynamic
range of signals. Small signal amplitudes are cut additionally, which at the same time reduces background
noise. Use the PARAMETER control to determine the expander threshold. EFFECT A adjusts the
expansion ratio, while EFFECT B drives a matching amplifier (much like in the compressor effect) to
adapt the level of the processed signal.
Preset-Nr. Effect Variatio n PARAMETER EFFECT A EFFECT
B
92 Overdrive Sensitivity Ratio Gain
93 Clean Sensitivity Ratio Gain
EXPANDER
Tab. 3.24: Parameters of effects 92 and 93
94-96 Guitar Combo: This effect simulates the sound characteristics of a complete guitar amp, mimicking
not only two tube stages, but also cabinet and speaker. The PARAMETER control determines the
distortion intensity, while EFFECT A adjusts the presence of the sound as the signals high-frequency
portions increase. EFFECT B controls the mix ratio.
Preset-Nr. Effect Variation PARAMETER EFFECT A EFFECT B
94 - Drive Presence Mix
95 - Drive Presence Mix
96 - Drive Presence Mix
GUITAR
COMBO
Tab. 3.25: Parameters of effects 94 through 96
3. EFFECTS PROCESSOR