Extron electronic DMP 44 LC manual DSP Processing and Signal Flow, Line Input Signal Chain

DSP Processing and Signal Flow

The diagram below shows the signal flow and DSP processing per signal chain. Signal chains and the matrix are described in the following sections.

All signal routing, processing, and level control (gain/trim/volume), are accomplished using software control from a PC connected to the DMP 44 LC via the USB configuration port or the RS-232 port. The DSP Configurator program provides complete control while SIS commands provide more limited control.

This section describes the signal processing including parameter ranges, and how to mix inputs and outputs using the DSP Configurator control program. To install the DSP Configurator program (see the “Software Control” section).

Line Input Signal Chain

Input signal chain GUI elements from left to right are as follows:

•Gain (GAIN) — Mono gain control with a range from -18 to +24 dB includes a mute button. Step resolution is 0.1 dB. A polarity switch (+ or -) is provided. Gain control is provided pre-meter and mute control is provided pre-meter.

•Filter (FILT) — Up to three filters can be inserted in any combination of High Pass, Low Pass, Bass & Treble shelving (tone), or Parametric Equalizer.

•Dynamics (DYN) — One compressor per block per channel. Dynamics processors vary the dynamic level (the range of loudest to softest signals).

•Ducking (DUCK) — One ducker per block, per channel. Each ducker can function as either a source or a target. Three levels of priority are available, where a ducker can function as both a source and a target (as an example, one source may be ducked by another source, and also trigger ducking on program channels).

•Gain (GAIN) — One pre-mixer gain control per channel with a range of -100 dB to +6 dB. The step resolution is 0.1 dB.

DMP 44 LC • Operation 14