DMP 128 FlexPlus

ProDSP Dante Digital Matrix Processors

Key Features

Two models with 60 total inputs and 32 total outputs
48x24 Dante audio networking with Dante Domain Manager and AES67 support
Twelve channels of AEC - acoustic echo cancellation
Certified for Microsoft Teams Rooms
Certified for Zoom Rooms
Verified with Logitech RoomMate
All models include a configurable USB Audio interface
V model includes up to eight VoIP lines that support generic Session Initiation Protocol - SIP 2.0 connectivity per RFC 3261

Model	Version Description	Part #
DMP 128 FlexPlus C AT	Dante Digital Matrix Processor w/ 12 AEC	60-1820-10
DMP 128 FlexPlus C V AT	Dante Digital Matrix Processor w/ 12 AEC and VoIP	60-1821-10

The DMP 128 FlexPlus series of compact Dante Digital Matrix Processors features twelve FlexInput channels with full DSP, including AEC, and Dante connectivity, in only a half rack space. With an extensive mix matrix, a USB audio interface, and analog compatibility, the DMP 128 FlexPlus provides the ability to easily connect and route multiple types of source signals to accommodate diverse analog and digital system requirements. For collaboration applications, the V model includes up to eight VoIP lines. Featuring an ACP bus for audio control panels, an expansion port for bidirectional digital audio connection with a DTP CrossPoint or another DMP, eight audio file players, and configurable macros, the DMP 128 FlexPlus can be used anywhere from a collaboration space, to a large conference room.

FlexPlus - Ideal for Multiple Dante Sources

The Dante-enabled DMP 128 FlexPlus series is ideal for applications that utilize Dante ceiling microphone arrays and other Dante‑enabled devices. With network connectivity for up to 48 Dante sources and 24 Dante destinations, the DMP 128 FlexPlus, featuring a built‑in two‑port Gigabit switch, enables the creation of simplified, cost effective audio systems.

FlexInputs

All twelve main DSP channels of the DMP 128 FlexPlus offer FlexInput source selection to route any Dante input, expansion input, or one of the four mic/line inputs, to a main DSP channel. This enables the DMP 128 FlexPlus to process audio from any source with the full range of DSP capabilities, including AEC.

Dante Connectivity

The DMP 128 FlexPlus provides scalable Dante digital audio transport, with Dante Domain Manager support, over a local area network using standard network protocols. A DMP 128 FlexPlus can be configured to support primary and redundant Dante audio networks, as well as AES67 interoperability.

Acoustic Echo Cancellation

The DMP 128 FlexPlus series includes Extron AEC for conferencing applications. AEC is essential for effective remote room-to-room conversations, ensuring clear, natural communication for all participants. These models include twelve 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 features advanced algorithms that deliver fast echo canceler convergence for optimal intelligibility, even in challenging conditions.

The DSP Configurator Software simplifies AEC and noise cancellation setup with a user-friendly interface that provides real-time metering for ERL - Echo Return Loss, ERLE - Echo Return Loss Enhancement, and TER - Total Echo Reduction levels. Guided alerts appear whenever ERL is outside of the optimal range for echo cancellation and DSP templates serve as starting points with routing optimized for AEC workflows. Optional settings include fine adjustments for NLP - Non-Linear Processing to maximize AEC performance in acoustic environments with significant sonic reflections or reverberation.

VoIP - Voice over Internet Protocol Capability

The DMP 128 FlexPlus C V AT includes up to eight SIP 2.0 VoIP lines, with wideband codec support, that can be configured as individual extensions or with multiple call appearance channels to support local conferencing applications. Compatible with select VoIP systems, any single V model of the DMP 128 FlexPlus series can be used for a single VoIP line or as a VoIP farm for up to eight rooms.

USB Audio Interface

The included USB audio interface provides connectivity to a computer for use with soft CODEC applications and computer sourced audio.

Automixer

The DMP 128 FlexPlus series features an automixer with gated and gain sharing modes that can manage 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, 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 which allows all mics to remain on, while the gain for each mic is adjusted in real time to ensure a constant system gain.

Powerful Routing Across Two ProDSP Processors

The DMP EXP expansion port allows two Extron ProDSP units to be linked together via a single shielded CAT 6 cable. This creates a 16 channel bi-directional 24-bit/48 kHz high-resolution digital audio expansion bus between the two units, allowing expanded input and output signal management and routing capabilities. This expanded 16x16 I/O channel transport between devices allows designers to create audio mixes with advanced I/O and signal management scenarios combining the capabilities of two processors. The expansion port is also available on Extron DTP CrossPoint® matrix switchers. This allows a 16x16 I/O channel transport between the matrix switcher and a DMP 128 FlexPlus to expand the number of available audio inputs for a DTP System, and to offer additional capabilities such as automixing, AEC - Acoustic Echo Cancellation, and VoIP - Voice over Internet Protocol.

Versatile Control Options

Each model is equipped with an ACP audio control port to support the use of Extron Audio Control Panels. ACP control is ideal for systems that do not require a full control system. A DMP 128 FlexPlus can also be controlled and configured via RS-232 serial control, Ethernet control, or USB. Each model also includes two digital I/O ports, which allow for external triggering such as mic activation and muting.

ProDSP

Extron’s exclusive ProDSP is engineered from the ground up using a powerful 64‑bit floating point DSP engine to provide very wide dynamic range and reduce the potential for clipping. ProDSP also utilizes studio grade 24‑bit audio converters with 48 kHz sampling to maintain audio signal transparency. ProDSP is loaded with powerful, easy‑to‑configure tools to control level, adaptive gain, automixing, dynamics, filters, delay, ducking, loudness, feedback suppression, and AEC.

Easy-to-Use DSP Configurator Software

The power of ProDSP is easily harnessed with the DSP Configurator Software. The flexible on‑screen layout offers fast access to all of the digital audio signal processing tools. Designers can quickly get a snapshot view of the entire audio system, including processing blocks and routing assignments, all at once.

Features

Two models with 60 total inputs and 32 total outputs — The DMP 128 FlexPlus offers signal routing and management for a wide range of sound system applications:

Inputs: 48 Digital via Dante or Expansion Bus, 4 Analog balanced/unbalanced mic/line level, 8 Aux for USB or VoIP
Outputs: 16 Digital via Dante or Expansion Bus, 8 Analog balanced/unbalanced line level, 8 Aux for USB, VoIP or File Players

48x24 Dante audio networking with Dante Domain Manager and AES67 support — Dante audio networking provides scalability for creating larger audio matrixes over a local area network using standard protocols. A built‑in two‑port Gigabit switch can be configured to support primary and redundant Dante audio networks.

Twelve channels of AEC - acoustic echo cancellation — The DMP 128 FlexPlus includes twelve independent channels of high performance AEC, as well as selectable noise cancellation. Extron AEC features advanced algorithms that deliver fast echo canceler convergence for optimal intelligibility in situations that challenge AEC performance.

Certified for Microsoft Teams Rooms
Certified for Zoom Rooms
Verified with Logitech RoomMate

All models include a configurable USB Audio interface — Easy connectivity to computer based soft codecs and program playback sources. The input/output configuration of the USB Audio Interface can be set to 0x8, 2x6, 4x4, 6x2, or 8x0. This allows for more input or output streams, as required by the system application.

V model includes up to eight VoIP lines that support generic Session Initiation Protocol - SIP 2.0 connectivity per RFC 3261 — The DMP FlexPlus C V AT is compatible with select VoIP systems and can be used for a single VoIP line or as a VoIP farm for up to eight rooms:

VoIP configuration via onboard web page separates AV and IT workflows
Flexible local conference calling with Extron exclusive independent audio processing and control per call - level, mute, hold, and hang-up per caller
Onboard SIP logging eliminates the need for network capture software
Supports standard and wideband codecs, with selectable priority
Quality of Service – QoS support for Layer 2 and Layer 3
Transport Layer Security – TLS and Secure Real-Time Transport Protocol – SRTP ensures industry standard call security
NAT Traversal supported via STUN, TURN, and ICE simplifies integration across challenging network topologies
VLAN support via 802.11Q Tags

Compact half rack size — Allows more input and output channels, with more processing power, to be installed in less space.

FlexInput capability on main inputs — All twelve main inputs offer FlexInput capability to select a Dante channel, expansion input, or one of the four mic/line inputs. This allows incorporating the full range of DSP capabilities, including AEC, for incoming Dante channels.

Optional ACP Series audio control panels provide intuitive audio system control — Direct interface with the DMP 128 FlexPlus offers flexible audio control for systems that do not require a full control system.

Digital I/O ports for remote control or feedback — Two digital input ports and two digital output ports are provided, so that the DMP 128 FlexPlus can be programmed to sense and then respond to external triggers such as mic activation, muting, and recall of presets.

Macros allow the sequencing of commands that can be sent to the local device or external devices via the LAN port — A single DMP 128 FlexPlus can act as the central interface from a control system, sending commands to other DMP, AXI AT, and DTP CrossPoint devices.

Aux inputs and outputs can be individually configured as audio file players, USB Audio, or in the V model, VoIP lines — Audio file players can be allocated to any aux input and used to play back prerecorded content. USB Audio and VoIP can be allocated to any aux input and any aux output. In these cases, the aux inputs function like returns and the aux outputs function like sends. For USB audio, that would be sends and returns to/from a room PC running a software codec, and VoIP would be sends and returns to/from the central VoIP PBX.

Advanced audio processing on all eight analog outputs and all 16 direct Dante/Expansion outputs — Up to 24 speaker zones can be implemented on one DMP 128 FlexPlus with full processing for each zone, making it ideal for full mix-minus implementations.

Extensive mix matrixing in every DMP 128 FlexPlus allows all inputs to be discretely routed to any or all outputs — Allows all 12 main inputs, 8 aux inputs, 48 Dante inputs and 16 virtual bus returns to be discretely routed to any or all of the 8 analog outputs, 8 aux outputs, 24 Dante outputs and the 16 virtual bus sends.

16 virtual processing loops allow for great flexibility in sub-mixing and processing — Processing common to many inputs can be applied using a single virtual channel.

Up to eight audio file players can be used to play back audio files for system set-up or as part of the system design — Use the provided pink noise, white noise, and sine wave files, or import your own WAV, MP3, WMA, AIFF, AAC, or RAW files. Supported file formats are automatically converted to 24-bit, 48 kHz RAW for approximately 20 minutes of playback time and saved to the onboard storage.

Low latency — Powerful DSP chips maximize performance, resulting in latency that is very low, from input to output, regardless of the number of active channels or processes. While latency increases in channels with AEC enabled, and marginally with the automixer, overall latency remains low. This keeps audio in sync with video, and prevents distractions to presenters or performers resulting from delayed live audio.

Adaptive Gain Processing — An adaptive gain processor block allows a specified microphone input to affect levels on any one or all other inputs and virtual returns.

Built-in two-port Gigabit switch — Provides daisy-chain operation with other Dante-enabled devices. These ports can be configured for redundant operation.

Supports 802.1X Authentication — Provides support for IEEE 802.1X authentication standard for port-based Network Access Control.

Digital audio expansion port for linking two Extron DSP units — An expansion port allows two DMP Plus models to be linked together via a single shielded CAT 6 cable. This creates a 16 channel bi-directional 24-bit/48 kHz high-resolution digital audio expansion bus between the two units, allowing expanded input and output signal management and routing capabilities. The expansion port is also compatible with Extron DTP CrossPoint matrix switchers for a 16x16 I/O channel transport between devices. A 1' (0.3 m) shielded CAT 6 cable is included.

Automixer with eight groups — The DMP 128 FlexPlus features 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, allowing for fine‑tuning to avoid the “chopped” sound characteristic of a traditional automixer when a mic is gated off.

ProDSP 64‑bit floating point signal processing — The DMP 128 FlexPlus features 64‑bit floating point audio DSP processing, which maintains very wide dynamic range and audio signal transparency, to simplify management of gain staging while reducing the possibility of DSP signal clipping.

48 volt phantom power — The DMP 128 FlexPlus is equipped with selectable 48 volt phantom power for the analog inputs, allowing the use of condenser microphones.

Studio grade 24‑bit/48 kHz analog‑to��digital and digital‑to‑analog converters — Fully preserves the integrity of the original audio signal.

DSP Configurator™ Software — A powerful yet user‑friendly PC‑based software tool for managing all audio operations of the DMP 128 FlexPlus. It enables complete setup and configuration of digital audio processing tools on the ProDSP platform, as well as routing and mixing.

Intuitive Graphical User Environment — The DSP Configurator Software features a Graphical User Environment that offers a clear view of all inputs and outputs, audio processing blocks, routing, mix points, and virtual routing in a single window. This allows a designer or installer to quickly view an audio configuration without having to access multiple windows or menus.

Device Manager enables configuration of multiple Extron DSP products — Device Manager in the DSP Configurator Software enables easy configuration of multiple Extron DSP products by toggling between Graphical User Environments for each unit. Processors can be grouped into folders for organizing as separate rooms or buildings. Settings for multiple Extron DSP products in Device Manager can be saved to a single file.

Copy and paste for processing blocks — To help speed audio system design and setup, parameter settings can be quickly copied between individual processing blocks or identical groups of blocks within the Graphical User Environment, using conventional cut‑and‑paste commands.

Building Blocks for channel processor settings — A collection of pre-designed processor settings optimized for a specific type of input device, such as microphones, with preset levels, filters, dynamics, and more. Flexible Building Blocks are available on each input strip and allow system designers to fully customize and save their own Building Blocks, further streamlining audio system design and integration.

Live and Emulate operation modes with configuration file saving — Live mode allows integrators to connect to the DMP 128 FlexPlus and make live parameter adjustments while hearing or metering them in real‑time. This avoids the need to compile and upload a configuration file to the DSP. Emulate mode allows settings to be configured offline, then uploaded to the DMP 128 FlexPlus. Additionally, current settings on a DMP 128 FlexPlus can be backed up to a configuration file for archiving.

32 DSP Configurator presets — Using the DSP Configurator Software, any parameters for DSP processing, levels, or audio routing can be saved as presets. These settings can be saved for the entire system, or any selected group of inputs, outputs, mix points, and DSP blocks.

Triple matrix design provides output, virtual, and expansion routing options — The DMP 128 FlexPlus employs a triple matrix design that offers substantial flexibility in routing, mixing, and processing audio input sources. The primary output matrix allows any of the inputs to be matrix mixed to any or all outputs. If desired, any of the inputs can first be directed into the virtual matrix, which routes the inputs to eight virtual buses, before being mixed back into the output matrix. Virtual buses allow inputs to be processed together as a group. The expansion matrix provides signal routing between a DMP 128 FlexPlus and another DMP or an Extron DTP CrossPoint matrix switcher. The expansion matrix is also used to distribute and receive audio from the Dante network.

Group controls — The DMP 128 FlexPlus provides the capability to consolidate gain or mute control throughout the system. Gain or mute controls can be selected and added to a group, which can then be controlled by a single control fader or mute control. Loudness filters can also be added to a group control, which enables the loudness curve to track with the program volume. Additionally, Bass and Treble filters can be configured in a group to provide boost and cut as user controls. Each group can have up to 128 members, and up to 64 group leader controls can be created.

Software-defined limits provide optimal group control adjustment range — The group control volume adjustment range can be limited to maintain optimal minimum and maximum levels when using external volume control. This prevents operators from over or under-adjusting levels. The DSP Configurator Software provides quick adjustment of limits from the Group Controls screen.

SpeedNav™ keyboard navigation — SpeedNav enables user‑friendly, keyboard‑based navigation of the DSP Configurator Software without the need for a mouse or touchpad. Using keyboard navigation keys and shortcuts, the user can access any input or output, mix point, and all audio DSP tools. Using only the keyboard for software access can help expedite audio system setup and optimization while on‑site using laptop PCs.

Front panel main input and output signal presence and clipping LEDs — The DMP 128 FlexPlus provides LEDs on the front panel for each main DSP input and output, for real‑time monitoring of signal presence. A separate LED illuminates as a warning whenever signal clipping is detected.

Front panel USB configuration port — Enables easy configuration without having to access the processor's rear panel.

Ethernet monitoring and control — Engineered to meet the needs of professional AV environments, Ethernet control enables the DMP 128 FlexPlus to be proactively monitored and managed over a LAN, WAN, or the Internet, using standard TCP/IP protocols.

External Extron Everlast™ power supply included, replacement part #70-1259-01 — Provides worldwide power compatibility, with high‑demonstrated reliability and low power consumption. This power supply is compatible with the ZipClip 100 and ZipClip 200 Mounting Kits.

Extron Everlast Power Supply is covered by a 7‑year parts and labor warranty

Note: Dante® is a trademark of Audinate® Pty Ltd.

DANTE NETWORK PRODUCTS
	AXI 02 AT	Two Output Dante Audio Interface
	AXI 22 AT	2 Input, 2 Output Dante Audio Interface
	AXI 44 AT	4 Input, 4 Output Dante Audio Interface
	AXI 22 AT D Plus	2 Input, 2 Output Dante Audio Interface - Decorator-Style Wallplate
	NetPA U 1002	Two Channel Power Amplifiers with Dante and DSP 100 Watts Per Channel
	NetPA U 1004	Four Channel Power Amplifiers with Dante and DSP 100 Watts Per Channel
	NetPA U 2002 SB	Two Channel Bridgeable Output Amplifier with Dante and DSP 200/400 Watts Per Channel
	NetPA U 8001 SUB	Mono Subwoofer Amplifier with Dante and DSP 800 watts
	NetPA 1001-70V AT	Mono 70 V Audio Power Amplifier with Dante - 100 Watts
	XTP II CP HD 4K PLUS I/O Boards	4K/60 HDMI Input and Output Boards

DANTE NETWORK PRODUCTS

AXI 02 AT

Two Output Dante Audio Interface

AXI 22 AT

2 Input, 2 Output Dante Audio Interface

AXI 44 AT

4 Input, 4 Output Dante Audio Interface

AXI 22 AT D Plus

2 Input, 2 Output Dante Audio Interface - Decorator-Style Wallplate

NetPA U 1002

Two Channel Power Amplifiers with Dante and DSP
100 Watts Per Channel

NetPA U 1004

Four Channel Power Amplifiers with Dante and DSP
100 Watts Per Channel

NetPA U 2002 SB

Two Channel Bridgeable Output Amplifier with Dante and DSP
200/400 Watts Per Channel

NetPA U 8001 SUB

Mono Subwoofer Amplifier with Dante and DSP
800 watts

NetPA 1001-70V AT

Mono 70 V Audio Power Amplifier with Dante - 100 Watts

XTP II CP HD 4K PLUS I/O Boards

4K/60 HDMI Input and Output Boards

OPTIONAL ACCESSORIES
	ACP 100	Audio Control Panel with Volume and 6 Control Buttons US 2-Gang
	ACP 105 D	Audio Control Panel with 5 Buttons Decorator-Style
	ACP 106 D	Audio Control Panel with 6 Buttons Decorator-Style
	ACP 106 EU	Audio Control Panel with 6 Buttons Flex55 and EU
	ACP VC1 D	Audio Control Panel with Volume and Mute Decorator-Style
	ACP VC1 EU	Audio Control Panel with Volume and Mute Flex55 and EU
	RSU 129	Universal Rack Shelf Kit for 9.5" Deep Products
	RSB 129	Basic Rack Shelf for 9.5" Deep Products
	UTS 100 Series	Under Table Shelf System
	Half Rack Shelf System	Half-Rack Width Rack Shelf and Accessories

OPTIONAL ACCESSORIES

ACP 100

Audio Control Panel with Volume and 6 Control Buttons
US 2-Gang

ACP 105 D

Audio Control Panel with 5 Buttons
Decorator-Style

ACP 106 D

Audio Control Panel with 6 Buttons
Decorator-Style

ACP 106 EU

Audio Control Panel with 6 Buttons
Flex55 and EU

ACP VC1 D

Audio Control Panel with Volume and Mute
Decorator-Style

ACP VC1 EU

Audio Control Panel with Volume and Mute
Flex55 and EU

RSU 129

Universal Rack Shelf Kit for 9.5" Deep Products

RSB 129

Basic Rack Shelf for 9.5" Deep Products

UTS 100 Series

Under Table Shelf System

Half Rack Shelf System

Half-Rack Width Rack Shelf and Accessories

RELATED PRODUCTS
	MVC 121 xi	Three Source Audio Mixer with DSP
	SSP 200	Surround Sound Processor

COMPATIBLE SOFTWARE
	DSP Configurator Software	DSP Application Software
	Toolbelt	Setup, Management and Troubleshooting Utility
	Dante Controller	Configuration Software for Dante-Enabled Audio Products
	DataViewer	Free Enhanced Terminal Emulation Software

SIMILAR PRODUCTS
	XMP 240	Dante Audio DSP Matrix Processor
	DMP 64 Plus	6x4 ProDSP Digital Matrix Processors
	DMP 128 Plus	12x8 ProDSP Digital Matrix Processors
	DMP 44 xi	4x4 Digital Matrix Processor
	DMP 64	6x4 ProDSP™ Digital Matrix Processor
	DMP 128	12x8 ProDSP™ Digital Matrix Processors
	DMP 44 LC	4x4 Digital Matrix Processor

Shipping Dimensions and Weights
Part #	Height	Width	Depth	Weight
60-1820-10	4.5" (11.4 cm)	13.75" (34.9 cm)	14.25" (36.2 cm)	4.52 lbs (2.05 kg)
60-1821-10	5.25" (13.3 cm)	13.75" (34.9 cm)	1.5" (3.8 cm)	4.9 lbs (2.22 kg)