Acustica Audio Amethyst

• Fabricant : Acustica Audio
• Modèle : Amethyst
• Catégorie : Tranches de console logicielles
• Fiche créée le : 01/03/2016

A virtual channel strip with preamp, filter, EQ and compressor features, for Mac OS X and Windows, with curves sampled from hardware built exclusively by Acustica and based on the circuit diagrams of vintage device.

•    OUTPUT GAIN knob controls plug-in output gain from -24 to +24

•    POWER button enables (lamp ON) or bypasses (lamp OFF) the plug-in

•    INPUT TRIM knob sets the input level from -24dB to +24dB, and is used to control the signal level inside the Eq, the output level is than automatically compensated by the same amount of gain. At the first execution of the plug-in, input is set to ensure that you feed an appropriate level from the first stage of your signal path to the final one.

•    INPUT – OUTPUT   STEREO METERS measure the input (LEFT position meter) and output (RIGHT position meter) levels of the plug-in. 


PREAMPS SECTION: 

The first processing stage is the preamp section, 
This plug-in is made up of 3 different preamps switchable.
Possible preamps are:

The 9098 button enables  the 9098 preamp, this Pre is more clean and linear
The 2500 MIX button enables the 2500 MIX Preamp, it has more transient reproduction    , It’s  quite clean.
The 2500 BUS button actives  the 2500 BUS Preamp, it is characterized by a low distortion and harmonics are more stark. It is more colored than 9098 preamp.


EQ SECTION


•    FREQUENCY CONTROL

Frequency ranges differ for the bands to accommodate maximum flexibility.
Available values are:

Low Band:  to 27Hz from 1000Hz
Low Mid Band:  to 27Hz from 1000Hz
High Mid Band: to 0.63KHz from 20KHz
High Band: to 0.63KHz from 20KHz

In addition For Low and High Bands there are two buttons that enable peak/shelf mode.


•    GAIN CONTROL

Gain control provides a  variable cut/boost range of -12dB/+12dB for each band

•    Q  CONTROL

The Q knob controls the sharpness of the peak or dip for each band, with a counter-clockwise detent for shelving on the LOW and HIGH bands;
The Q range values are different for band;

LF – HF:  from 0.2 to 1.7  
LMF – HMF:  from 0.4 to 3.5  



FILTERS SECTION

LOW-PASS/HIGH-PASS FILTER

Each filter is independently from the others
•     HP1 button:  this HIGH-PASS 1 filter passes frequencies above its cutoff frequency and attenuates frequencies below its cutoff frequency. 
The range is  27 Hz to 1000 Hz.
•     HP2 button: this HIGH-PASS 2 filter is activated pressing the appropriate button HP2. 
The cutoff frequency of HP2 is fixed at 80Hz.
•    LP1 button: this LOW-PASS 1  filter passes frequencies above its cutoff frequency and attenuates frequencies below its cutoff frequency.
The range is  60 Hz to 240 Hz.
•    LP2 button: this LOW-PASS 2 filter is activated pressing the appropriate button LP2. 
The cutoff frequency of LP2 is fixed at 10KHz.


COMPRESSOR SECTION

•    COMP IN BUTTON pushing this button the Compressor is activated
•    INSANE BUTTON This mode allows you to increase the accuracy and speed of the compressor but it’s more expensive (in terms of CPU usage)
•    HARD KNEE (HK)
The “Hard Knee” button selects a shape to the compression curve. When not selected, compression begins gradually as the signal exceeds the threshold. It only reaches the set ratio several dB above the threshold. Selecting Hard Knee makes the change less gradual.

•    GAIN REDUCTION METER measures the reduction level applied by compressor, the meter indicates '0' in the absence of an input signal or any gain reduction. If the signal exceeds the compression threshold or limit level, the amount of gain reduction is displayed.
•    THRESHOLD: This knob set the threshold of the compressor from -30dB to a minimum of -18dB; 
•    RATIO: This knob set the compression ratio, available values range from 1:2:1 to 16:1; 
•    ATTACK: This knob set compressor's attack time that range from 0.3 ms (fast) to 300 ms (slow); 
•    RELEASE: This knob set compressor's release time that range from 0.1 ms (fast) to 10 ms (slow);
•    MAKEUP: this knob sets the gain compensation and is designed to boost the compressed signal in order to match the level of uncompressed signal.

• Sample rates up to 96 kHz
• VST, AU and AAX 32 and 64-bit for Mac OS X and Windows