This extension to the EtherSound specification enables bi-directional audio distribution over the same cable, as well as higher sample rate conversions at 88.2, 96, or 192kHz. The EtherSound licensees, which currently include NetCira by Fostex, Nexo, Bouyer, Innova Son, and Auvitran, will autonomously determine their individual product plan to implement the new features into their products. Many existing EtherSound products are compliant with the new technology and can be upgraded in the field by installing a new firmware.

Before the release, Digigram's EtherSound protocol was restricted to uni-directional audio distribution, meaning all devices located 'downstream' from a source may playback audio from that source. Bi-directional EtherSound now allows the creation of a virtual buss between daisy-chained devices where a maximum of 64 channels of 24-bit/48kHz audio is available for inputs and outputs of all connected devices, be they 'upstream' or 'downstream' of the source. In both versions, control and monitoring data are bi-directional and use the same cable as the audio.

Bi-directional EtherSound maintains the technology's very low and predictable latency (125 microseconds), which is suitable even for the most demanding applications such as live sound or broadcast.

New generation EtherSound networks are able to combine uni and bi-directional sub-networks and new generation EtherSound devices will be able to operate in both uni and bi-directional mode. The firmware of many EtherSound devices currently sold can be upgraded to bi-directional EtherSound.

Next generation EtherSound now enables higher sampling frequencies with multipliers of 44.1 or 48kHz, such as 88.2, 96, 192kHz, etc., while maintaining the technology's very low and predictable latency (125 microseconds at 96kHz).

The addition of the entry level agreement and an authorised EtherSound implementor partner program has enabled pro audio manufacturers to rapidly build EtherSound-compliant products with very limited development investment. Entry level licensees have the right to implement ready-to-use EtherSound modules provided by Digigram or Authorised Implementors and French company Auvitran has been appointed as the first Authorised Ethersound Implementor.

"In a still difficult economical environment, many manufacturers hesitated to invest into EtherSound, because they lack experience with networking technologies, but need a very fast return on investment," commented Digigram MD Philippe Delacroix. "The Entry Level Licensing Agreement, combined with the appointment of the first Authorised Implementor, now offers a very fast and very cost-effective way of bringing EtherSound-enabled products to the market."