Input selection and conditioning:
The Audio Processor Silver 4B-mini FM offers the user input selection between analog and digital. The audio is then routed through optional pre-emphasis filters.
The Audio Processor Silver 4B-mini FM offers bass enhancement via a peaking filter that can be set to provide up to 6 dB of gain on one of four frequencies with a choice of 4 Q’s.
The Audio Processor Silver 4B-mini FM processes each band with RMS based levelers. Each band, gain control, and processing function can be configured in different manners to provide different effects. Adjustable timing constants, drive and silence gating afford the user full control of this important stage of the processor.
Each band has its own dynamic peak limiter. Multiple time constant based detectors are adjustable as well as input drive levels.
The Audio Processor Silver 4B-mini FM includes a 4 band equalizer. It allows you to subtly color your sound after the Multi Band Limiter stage, and before the audio goes into the peak processing path.
Bass Clipper :
The Audio Processor Silver 4B-mini FM peak limits (clips) and linear phase filters the low frequencies before these are fed to the final clipper stages.
Distortion Controlled Clipper:
The Audio Processor Silver 4B-mini FM’s main clipper uses sophisticated algorithms to produce tightly peak controlled output and maximum distortion control
The stereo encoder is highly over-sampled and offers superb stereo performance. A composite clipping function is provided for those who wish to use it.
PC software enables easy local or remote configuration of the Audio Processor Silver. Connection is made through RS232 (serial or USB port) or via TCP/IP. All parameters can be configured with the user friendly interface and the results are displayed on the LED meters, on the front panel and on the configuration screen of the software.
|ANALOG AUDIO INPUT|
|Impedance||>10k. load impedance, electronically balanced|
Nominal Input Level
|Software adjustable from –12.0 to +12.0 dBu (VU)|
|Maximum Input Level||+24 dBu|
|Connectors||XLR female, floating and symmetrical|
|A/D Conversion||48KHz 24 bit 128x oversampled delta sigma converter with linear-phase anti-aliasing filter|
|ANALOG AUDIO OUTPUT (4B and 6B only )|
|Source Impedance||10 Ohm, electronically balanced and floating|
|Load Impedance||600 Ohm or greater, balanced or unbalanced|
|Output Level (100% peak modulation)||Software adjustable from –12 dBu to +24 dBu peak, into 600 Ohm or greater load.|
|Signal-to-Noise||>= 90 dB un-weighted (Bypass mode, no pre-emphasis, 20 Hz–15 kHz bandwidth, referenced to 100% modulation)|
|L / R Crosstalk||<= –70 dB, 20 Hz–15 kHz|
|Distortion||<= 0.01% THD (Bypass mode, no pre-emphasis) 20 Hz–15 kHz bandwidth|
|Connectors||XLR male. Pin 1 chassis ground, Pins 2 (+) and electronically balanced, floating and symmetrical|
|D/A Conversion||48KHz 24 bit 128x oversampled|
|Frequency response||<+-0.1dB, 2Hz – 15kHz|
|Processing sample rate||48kHz – 768kHz depending on processing stage|
|Processing resolution||internal processors are 24 bit (fixed point) or higher|
|BNC, floating, EMI suppressed, with high pass filter|
|19 kHz Pilot Reference||BNC, 5V sine unbalanced and floating over chassis ground. Software selectable|
DIGITAL AUDIO INPUT
|Configuration||AES/EBU Stereo, 24 bit resolution, software selectable to stereo, mono (left), mono (right) or mono (sum)|
|Sampling Rate||32, 44.1, 48, 88.2, or 96 kHz, automatically selected|
|Connector||XLR female. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 ohm impedance|
|COMPOSITE OUTPUT (FM versions only)|
|Source Impedance||10 Ohm Single-ended, floating over chassis ground|
|Load Impedance||600 Ohm or greater|
|Maximum Output Level||+12.0 dBu (peak) software-controlled|
|Minimum Output Level||0dBu (peak) software-controlled|
|Pilot Level||Adjustable from 6.0% to 12.0% (or OFF), software controlled|
|Pilot Stability||±1 Hz (10 degrees to 40 degrees C)|
|Signal-to-Noise Ratio||<= –85 dB (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth|
|Distortion||<= 0.02% THD (Bypass mode, no pre-emphasis, 20 Hz – 15 kHz bandwidth|
|Stereo Separation||Typ. > 70 dB 30 Hz - 15 kHz|
|Crosstalk, Linear||<= –80 dB, main channel to sub-channel or sub-channel to main channel|
|Crosstalk, Non-Linear||<= –80 dB, main channel to sub-channel or sub-channel to main channel|
|38 kHz Suppression||>= 70 dB|
|76 kHz & Sideband Suppression||>= 80 dB|
|Connector||BNC, floating over chassis ground|
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