Extron has started limited shipping of its new DMP 128 and DMP 128 C Digital Matrix Processors. Both DMP 128 models are 12×8 audio mixers featuring Extron ProDSP, automixing, and I/O expansion capabilities. The DMP 128 Series offers a configuration approach to DSP for quick mixing, routing, conferencing, and room optimization. Configuration using the DSP Configurator software allows the DMP 128 Series to be installed quickly but still allows for 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 C model includes Extron AEC for conferencing applications. AEC is essential for effective remote room-to-room conversations and includes eight independent channels of 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 features  algorithms that deliver fast echo canceler convergence for optimal intelligibility.

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 — all managed through Extron’s DSP Configurator software.

Here are all the specs.