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 | COMPRESSOR | fast | Sensitivity | Ratio | Gain |
| 91 | slow | Sensitivity | Ratio | Gain |
| |
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 | Variation | PARAMETER | EFFECT A | EFFECT B |
| 92 | EXPANDER | Overdrive | Sensitivity | Ratio | Gain |
| 93 | Clean | Sensitivity | Ratio | Gain |
| |
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 signal’s high-frequency portions increase. EFFECT B controls the mix ratio.
| Preset-Nr. | Effect | Variation | PARAMETER | EFFECT A | EFFECT B |
| 94 | GUITAR | - | Drive | Presence | Mix |
| 95 | - | Drive | Presence | Mix |
| COMBO |
| 96 | - | Drive | Presence | Mix |
| |
Tab. 3.25: Parameters of effects 94 through 96
