The MADI Interface Card for NEXUS Base Devices

Combined Version with BNC input, BNC Output and LC Optical Connection

The board has both BNC and optical LC connectors via which the Madi signal can be fed into the Base Device. The preferred input can be selected in the operating software; in automatic mode, the module automatically recognizes which connection is used.

Adjustable Digital Gain in the Inputs

The input signals can be amplified or reduced with a digital gain adjustable in 1dB steps.

Transmission of Dolby E Signals

The XMF board is certified by Dolby Laboratories, Inc. to transmit Dolby E signals.

Optional Sample Rate Converter

Optional sample rate converters can be supplied for the XMF card, which can be optionally assigned to the inputs or outputs.

Support of MADI Legacy Audio at 96 kHz

MADI data streams in legacy format can also be received and sent without any problems. By halving the number of channels, the sampling rate can be doubled.

Evaluation of Additional Data in the MADI Data Stream

The following additional data contained in the MADI data stream are evaluated by the XMF card the first four bytes of the channel status such as format, emphasis, lock, etc. and the channel parameters (on/off, A/B, validity).

Automatic Detection of the Number of Channels in the MADI Data Stream

When evaluating the MADI additional data, the number of received channels is automatically recognized.

In the Studio Application Feeding of Multi-Channel Audio, e.g. from Effect Racks

It is becoming increasingly common for external digital devices to support mixing consoles with effects. The MADI standard has proven itself in both studio and live operation. Well-known companies offer hardware solutions that use this format and have found an easy way to integrate their systems into the NEXUS network in the XMF card. Examples include the Waves Soundgrid system and the Universal Audio Live Rack with its electrical and optical MADI interfaces for real-time audio effects.

Connection of DAWs or other Multi-Channel Feed Systems

Shows and events are often supported with feeds from DAWs or other playback systems. Integrating such multi-channel audio sources into NEXUS-based production is easy with the XMF-MADI interface. Multiple MADI connections can be seamlessly integrated and the channels, including status information, can be routed on the NEXUS network. With the same interface, e.g. DirectOut or other audio signals for recording can be sent on the return channel.

Multi-Channel Recording from the NEXUS Network

Recordings are common at events and productions, whether as quality assurance or for follow-up in any form. For example: A concert is mixed with a Stage Tec console, microphones and line sources are connected to NEXUS Base Devices on stage. In addition to the Star Router, which contains the audio processors of the mixing console, there is also a NEXUS Base Device with audio outputs, which is intended for transferring the mix to the system technician, inputs for feeders and talkback microphones. There is also an XMF board that supports a DAW or mobile recording device that can be powered by any audio channel on the NEXUS network: unprocessed input signals, mixer signals from a freely selectable direct-out point, summing, etc. MADI is an excellent multi-channel interface with 64 audio channels per line for such purposes, because any audio signals from the NEXUS network can be converted into a MADI data stream and additionally provided with status information.

Connections between Different NEXUS Networks

It is possible for two separate NEXUS networks to exchange audio channels, but it is not possible to merge them, such as temporary scenarios such as support for studio production by an OB truck or collaboration between several OB vans during an event. Even permanent installations, such as 96kHz for recording and 48kHz for sound reinforcement and broadcasting, require separate NEXUS systems
; in these situations where separate NEXUS networks are required to exchange audio channels, this can easily be done via MADI lines. The integrated sampling rate converters ensure optimum connectivity even in asynchronous operation.

NEXUS / NEXUS Star Technical Specifications

XMF Technical Specifications