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Extron Now Shipping Select DMP 128 Audio DSP Models With Acoustic Echo Cancellation
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Extron Electronics has announced the immediate availability of the DMP 128 and DMP 128 C digital matrix processors.

Both DMP 128 models are 12x8 audio mixers featuring Extron ProDSP, automixing, and I/O expansion capabilities. The DMP 128 C version also offers AEC - acoustic echo cancellation.

The DMP 128 Series offers a configuration approach to DSP that simplifies mixing, routing, conferencing, and room optimization. Quick and intuitive configuration using the DSP Configurator Software allows the DMP 128 Series to be installed in very little time, with easy-to-learn adjustments that can be heard in real-time.

A digital audio expansion port allows two DMP 128 units to be linked together to expand input and output signal management and routing capabilities.

“The DMP 128 is our latest ProDSP processor featuring a 12x8 audio matrix mixer, plus Extron AEC that delivers robust, dependable acoustic echo cancellation, and is very easy to set up and configure,” says Casey Hall, vice president of sales and marketing for Extron. “This DSP also includes an expansion port which allows two DMP 128 units to be linked for creating an expanded matrix.”

The DMP 128 C model includes Extron AEC for conferencing applications. AEC is essential for effective remote room-to-room conversations, ensuring clear, natural communication for all participants.

It also includes eight independent channels of high performance AEC, as well as selectable noise cancellation. AEC processing can be challenged by conditions such as double-talk, when talkers from both ends are speaking simultaneously, and when near end talkers use wireless microphones.

Extron AEC utilizes advanced algorithms to deliver fast echo canceler convergence for optimal intelligibility, even in challenging conditions.

Both models include an automixer with gated and gain sharing modes for managing up to eight groups of microphone signals. Gating threshold, signal level reduction, and timing parameters are user-adjustable per channel. This allows for fine-tuning to avoid the “chopped” sound characteristic of a traditional automixer when a mic is gated off.

As the number of active microphones is doubled, system gain is automatically reduced by half, uniformly attenuating microphone signal levels to minimize audible changes in the overall sound and the possibility of feedback.

For a natural sounding mic mix, the automixer also offers a gain sharing mode when the NOM - number of open microphones is bypassed, allowing all mics to gate on. When a DMP 128 is linked to another unit through the expansion port, each incoming expansion bus can be assigned to an automixer gating group.

Extron ProDSP is engineered from the ground up using a 64-bit floating point DSP engine and studio grade 24-bit converters with 48 kHz sampling. It is managed by the intuitive DSP Configurator Software, a PC-based application featuring an easy-to-use GUI that allows for complete audio system visualization within a single window. Designers can quickly get a snapshot view of the entire audio system, including processing blocks and routing assignments, all at once.

Extron Electronics


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