NTP PENTA 721 Digital Audio Interface


PENTA 721 is a new generation audio router and audio distribution interface from NTP Technology, which provides a versatile and flexible interface for signal distribution of digital audio via AES/EBU and MADI as well as routing via IP Gigabit Ethernet and optical fiber networks.

PENTA 721 is a compact 1U digital audio interface designed for stand-alone use in recording studios, radio stations, and stage venues. It comes with eight-channel AES/EBU input/output channels, MADI and two IP Audio Ethernet in/outs as well as a mini-module slot for ST optical MADI connection or dual SFP MADI optical in/out.

Key Features

– 8 AES/EBU I/O and 1-3 MADI I/O
– IP audio L3 Ethernet I/O powered by Dante
– TCP/IP control via NTP Router Control System and Standalone control applications for PC Single or Dual power supply

Key Benefits

– Flexible patching and routing of digital audio signals providing
– Stand-alone IP audio interface and format converter
– Interface for NTP TDM router systems
– Low latency, tightly synchronized, transport of uncompressed audio over IP networks using off the shelf switches

Signal Routing

PENTA 721 includes a 1024×1024 multiplexer, enabling all analog and digital inputs and outputs to be routed in any combination; this enables the unit to also split signals for advanced signal distribution. The multiplexer can be used to establish the static connections of the signal inputs and outputs, and furthermore it incorporates soft switching with a fade down and fade up the functionality of the signal level. Soft switching ensures that setting or changing a signal path can be made without any audible click or artifact.

IP Audio Powered by Dante

The PENTA 721 IP Audio protocol is based on the robust tried-and-tested Dante™ digital audio network technology and will interoperate with products of other brands that comply with Dante. The Dante IP Audio format provides fast, flexible, and economical audio routing via IP and is compatible with NTP PENTA 720 Modular I/O and other Dante devices. The IP Audio routing provides Low latency, tightly synchronized, transport of uncompressed audio over Gigabit IP Ethernet Layer 3 networks using off the shelf switches, and routers for audio routing via one or more sub-nets. A total of 512 channels can be routed on a 1 Gigabit network, and more if the network capacity is higher.


The PENTA 721 is TCP/IP controlled via one or two Ethernet ports. Control and supervision can be made by the NTP RCCore control system, and the operation is done via the NTP VMC control software client applications. A simple dedicated software control application for Windows is available for controlling and setting up PENTA 721 on a unit to unit basis when the less advanced operation is required.

The IP Audio routing is for larger systems controlled by the NTP RCCore Router Control System, for easy and simple setting of connections on the Gigabit IP Ethernet. PENTA 721 can also be controlled by the Dante IP Audio routing controller software.

Installation Guide

For more details on getting started with Penta 721, please download this Installation Guide… 


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