QSC Audio DSP-4 manual Signal Processing Functions and Additional Features

DSP-4

Signal Processing Functions and Additional Features

Multiple Parametric Filters, assignable anywhere in the signal chain:

Variable Frequency	Bypass all EQs
Variable Gain	Add EQ
Variable Q	Delete EQ
Bypass one EQ	Show Response

Multiple Delays, assignable anywhere in the signal chain: 20.83 µsec incremental

910 msec maximum (total of all delays)

Compressor, assignable anywhere in the signal chain:

Gain	Release Time
Threshold	Show Response
Ratio	Bypass
Attack Time

Output Peak Limiter, assignable anywhere in the signal chain:

Gain	Release Time
Threshold	Show Response
Attack Time	Bypass

High and Low-Pass Crossover Filters, assignable anywhere in the signal chain:

Butterworth 6, 12, 18, 24 dB per octave slope Bessel 6, 12, 18, 24 dB per octave slope Linkwitz-Riley 12 and 24 dB per octave slope

Bypass one EQ	Delete EQ
Bypass all EQ’s	Show Response
Add EQ	Cutoff Frequency

High and Low-Pass Shelf Filters, assignable anywhere in the signal chain:

Variable Corner Frequency	Bypass all EQs
Variable Gain	Add EQ
Variable Q	Delete EQ
Bypass one EQ	Show Response

Signal Mute

Attenuation 0.1 dB steps

Mix Post Crossover Audio (2➞1 Mixer)

Signal Splitter

Built-in Noise Generator (Pink & White)

Built-in Variable Frequency Tone Generator

Signal Polarity Reversal

Frequency Response

Clip and Protect Indication of the amplifier’s output

Predictive Delay Feature — produces less signal distortion than analog compressor/limiters — especially for fast attack times

Hardware

Two independent channels of DSP

48 kHz, 24-bit converters

No turn on pops or “zipper” noise

If the memory or hardware fails, unit turns on muted to prevent driver damage

Host interface via RS-232 or QSControl Audio Network System via CM16a Amplifier Network Monitor

Electronically balanced XLR inputs

Contact closure to trigger preset changes

Post DSP output signal for daisy chaining

Selectable input sensitivity: 1.5, 4, 9, 18 Vrms; 6, 14.5, 21.5, 27.5 dBu; 3.5, 12, 19, 25 dBV

Output signal gain

Software

“Drag-and-drop” configuration software

DSP processing power and memory is dynamically assigned to signal processing functions — eliminating the limitations imposed by fixed signal chain designs

Graphical representation of DSP resources

Firmware upgrades via RS-232

Hard copy printout of signal flow layout or parameter settings System Requirements

Windows® 98, NT4 (SP6), and 2000 (SP1)*

SVGA monitor at 800 x 600 (min.); 1024 x 768 recommended CD-ROM drive

32 MB RAM (min.)

10 MB free hard disk space (min.) Available RS-232 COM port

Male to female 9-pin serial cable (for programming) * Windows Me not supported