AXP 64 C AT

The Extron AXP 64 C AT is an audio expansion processor with six mic/line inputs and four line outputs for remote connectivity to a Dante^®-enabled audio system. It is used to place six mic/line sources onto a Dante audio network, and route any four Dante channels from the network to an amplifier or other destination. The AXP 64 C AT features Extron ProDSP™ with gain, filtering, and dynamics processing for all inputs and outputs. Four of the inputs also include AEC, 48 volt phantom power, and dedicated control ports for mic control. FlexInputs offer the additional capability to process Dante channels in place of local analog inputs 1 - 4. A single Ethernet cable from one AXP 64 C AT, or several linked units, to a central equipment rack greatly reduces the effort and expense of pulling one cable for each endpoint.

Remote Input and Output Expansion with Processing

The AXP 64 C AT accepts six channels of balanced or unbalanced analog audio, four with 48 volt phantom power, and digitizes them at 24-bit/48 kHz for output via Dante. The AXP 64 C AT includes four independent channels of AEC with advanced algorithms for fast convergence and optimal intelligibility in conferencing applications. For remote processing of Dante audio network signals, inputs 1 - 4 can access any Dante channel on the network. When compared to a conventional input expander or break-in box, the AXP 64 C AT is truly unique in that it incorporates DSP for each input channel. This makes it much simpler and less expensive to expand input channel capacity by avoiding the need to install a remote break-in box plus additional DSP hardware at the central rack, which may otherwise be underutilized.

Each input is routed directly to the Dante network for routing to any Dante-enabled device such as the DMP 128 Plus AT or DMP 128 C P AT. For conferencing applications where a pre-processing feed is required, inputs 1 - 4 also offer a post-filter/pre-AEC output to the Dante network.

The AXP 64 C AT can convert four Dante channels and route them to the four line level outputs. This enables audio from the Dante network to be sent to a sound reinforcement system or other audio destination. The AXP 64 C AT provides dedicated filtering, dynamics, and delay processing for the line level signals to optimize the audio for the local environment.

A sound system designer can incorporate several AXP 64 C AT or AXP 50 C AT audio expansion processors to create a large mixing matrix with up to 48 remote inputs and 24 outputs per DMP 128 Plus AT. Each AXP product is connected over Ethernet using standard IP networking protocols. This greatly simplifies scalability and the audio cabling infrastructure. Utilizing the Dante network also avoids a long analog mic cable run for each endpoint and the possibility of introducing noise into the system. For further convenience, multiple AXP Series and DMP 128 Plus AT units can be linked over their integrated four-port Gigabit switches.

FlexInput Channels

The four AEC-enabled inputs on the AXP 64 C AT offer FlexInput capability to route a Dante channel in place of a local mic/line input. The flexible input selection enables the AXP 64 C AT to process audio from remote wireless microphones, wallplates, and other sources from anywhere on the Dante network.

Convenient Under-Table and Surface Mounting

The AXP 64 C AT is housed in a compact 1U, half rack width enclosure that can be installed underneath a conference table or inside a credenza near microphones, sources, and remote audio destinations. Optional Extron UTS Series or MBU 123 mounting hardware is available separately to facilitate under-table and surface mounting.

Acoustic Echo Cancellation at the Source

The AXP 64 C AT includes four independent channels of Extron AEC for conferencing applications. An AEC reference signal is provided over the Dante network by a DMP 128 Plus C AT. AEC is essential for effective room-to-room conversations, ensuring clear, natural communication for all participants. Each AEC processor in the AXP 64 C AT includes selectable noise cancellation. The AXP 64 CAT provides up to 20 dB of noise cancellation without noticeable artifacts, for unparalleled performance and increased intelligibility to the far end. 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. Optional settings include fine adjustments for NLP - non-linear processing to maximize AEC performance in acoustic environments with significant sonic reflections or reverberation.

Flexible Signal Routing

The internal DSP architecture of the AXP 64 C AT sends both pre- and post-processing input feeds for the first four input channels onto the Dante network. The last two channels offer post-processing feeds to the Dante network. This provides the flexibility to limit the signal processing on mic input signals for recording, assistive listening, or voice reinforcement feeds, while applying full processing and AEC to a conferencing application. Filter blocks are situated prior to the pre-processing outputs, applying low frequency roll-off to attenuate breath and wind noise and other EQ settings, while bypassing the AEC. For conferencing applications, AEC processing, together with dynamics and EQ, is an absolute necessity to ensure optimal audio quality to the far end.

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, AEC, dynamics, and filters.

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 processing tools for the AXP 64 C AT, including gain, filters, and dynamics for each input and output, plus AEC for inputs 1 - 4. Designers can quickly get a snapshot of the entire audio system, including processing blocks and signal paths, all at once.

Dante Audio Networking

Dante enables audio system scalability over a local area network using standard Internet protocols. A built-in four-port Gigabit switch provides direct interconnection of multiple AXP Series and DMP 128 Plus AT units to create larger, cost-effective audio matrixes. Additionally, the AXP 64 C AT can be configured to support primary and redundant Dante audio networks.

Setting up a network of Extron Dante-enabled products, including the AXP 64 C AT, requires Dante Controller software, as well as the DSP Configurator Software. Dante Controller is used to easily assign an output from the AXP 64 C AT to inputs on DMP 128 Plus AT units or third-party devices. Dante Controller is also used to assign Dante channels from the network to the four digital FlexInputs of the AXP 64 C AT, for processing and routing Dante channels for local sound reinforcement systems via its physical outputs, and to assign the four AEC reference inputs for the processor.

Control

Control and configuration are conveniently available via the built-in four-port Gigabit switch. Any port can be designated for control only. The AXP 64 C AT includes digital I/O ports for inputs 1 - 4, which allow for external triggering such as mic activation and muting, and illuminating status LEDs.

Features

• Inputs: six balanced or unbalanced mic/line level on 3.5 mm, 3-pole captive screw connectors
• Outputs: four balanced or unbalanced line level on 3.5 mm, 3-pole captive screw connectors
• 10 DSP expansion outputs, placed directly onto a Dante™ audio network
• Six mic/line level inputs for transmitting audio to a Dante network — The AXP 64 C AT adds six additional processed inputs to the Dante network for easy system expansion. This avoids the need for a break-in box plus additional DSP hardware at the central rack, which may otherwise be underutilized.
• Four inputs with 48 volt phantom power — The AXP 64 C AT is equipped with selectable 48 volt phantom power for inputs 1 - 4, allowing the use of condenser microphones.
• Four independent channels of AEC - acoustic echo cancellation — The AXP 64 C AT includes high performance AEC on the first four inputs, as well as selectable noise cancellation with unparalleled performance. Extron AEC features advanced algorithms that deliver fast echo canceler convergence for optimal intelligibility in situations that challenge AEC performance, including double-talk, and the use of wireless microphones at the near end.
• Four inputs with FlexInput capability to select between analog or Dante inputs — Offers the option to route either a local mic/line input or a Dante input through the processor on the four AEC-enabled channels to allow remote wireless mics, wallplates, and sources from anywhere on the Dante network to be brought into the AXP 64 C AT.
• Four line outputs receive audio from a Dante network — The AXP 64 C AT converts audio channels from the Dante network to line level signals with delay, filtering, and dynamics processing tailored for the local environment.
• Dante audio networking provides a wide range of expansion capabilities — The Dante equipped AXP 64 C AT, in conjunction with a DMP 128 Plus AT, provides scalability for creating larger audio matrixes over a local area network using standard Internet protocols. A built-in four-port Gigabit switch provides direct interconnection of multiple AXP Series and DMP 128 Plus AT units to create larger, cost-effective audio matrixes.
• Built-in four-port Gigabit switch — Provides network pass-through to additional AXP Series units and direct interconnection to DMP 128 Plus AT units.
• One digital input and dual digital outputs at mic/line inputs 1 - 4 for control — The AXP 64 C A T provides input, ground, and dual outputs at mic/line inputs 1 - 4, which allow for external triggering such as mic activation and muting, and illuminating status LEDs.
• Compact 1U, half rack width metal enclosure — The half rack width, 9.5" (24.1 cm) deep enclosure is designed for inconspicuous under-table placement near table microphones and line level sources using the UTS Series Under Table Shelf System or MBU 123 Low-Profile Mount Kit, available separately.
• ProDSP™ 32/64-bit floating point signal processing — The AXP 64 C AT features 32/64-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 signal clipping.
• Studio grade 24-bit/48 kHz analog-to-digital and digital-to-analog converters — Professional converters fully preserve the integrity of the original audio signal.
• Low latency DSP processing — The AXP 64 C AT features very low, deterministic latency from input to output, regardless of the number of active channels or processes. While latency increases in channels with AEC enabled, overall latency remains low. This keeps audio in sync with video, and prevents distractions to presenters or performers resulting from delayed live audio.
• DSP Configurator™ Software — A powerful yet user-friendly PC-based software tool for managing all audio operations of the AXP 64 C AT. It enables complete setup and configuration of digital audio processing tools on the ProDSP platform.
• Supports Extron DSP Templates that are preconfigured as starting points to facilitate and simplify system configuration — Our DSP templates are designed for ease of use and education. Technicians and Junior Engineers alike can use them to get a system up and running with minimal effort, saving time and labor costs and learning while they do so. Senior Engineers can relax knowing their technical staff are implementing systems in a methodical and consistent manner.
• Intuitive Graphical User Environment — The DSP Configurator Software features a Graphical User Environment that offers a clear view of all inputs, outputs, and audio processing blocks in a single window. This allows a designer or installer to quickly view an audio configuration without having to access multiple windows or menus.
• Flexible pre- and post-processing input signal routing — The internal DSP architecture of the AXP 64 C AT sends both pre- and post-processing input feeds from inputs 1 - 4 onto the Dante network. The last two input channels provide post-processing feeds to the Dante network. This provides the flexibility to provision signals for specific applications using unprocessed signals for recording or assistive listening, and using processed signals for voice reinforcement and conferencing applications.
• Device Manager enables configuration of multiple Extron DSP products — Device Manager in the DSP Configurator Software enables easy configuration of multiple Extron DSP products, including networked AXP Series or DMP 128 Plus processors, 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.
• Flexible control options — The AXP 64 C AT can be controlled using the DSP Configurator Software and a PC connection to the Ethernet port. The AXP 64 C AT can also be controlled through a control system with Extron SIS™ - Simple Instruction Set commands.
• 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 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 AXP 64 C AT 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 AXP 64 C AT. Additionally, current settings on an AXP 64 C AT can be backed up to a configuration file for archiving.
• 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 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 input signal presence and clipping LEDs — The AXP 64 C AT provides LEDs on the front panel for each input and output, for real-time monitoring of signal presence. A separate LED illuminates as a warning whenever analog signal clipping is detected.
• Ethernet monitoring and control — Engineered to meet the needs of professional AV environments, Ethernet control enables the AXP 64 C AT 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 #70-1174-01 — 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