AuviTran’s AVA4-ES100 is a configurable EtherSound analog audio interface with 2 balanced analog audio inputs, 2 balanced analog audio outputs and a SPDIF digital audio output. AVA4-ES100 is a full ES100 compatible device and can be used without any restriction in any kind of ES100 network. AVA4-ES100 audio input sensitivity configuration enable a wide range of use from line input up to microphone input. Built-in AVA4-ES100 parametric equalizers and gain control on all inputs and outputs allow audio quality and intelligibility control in any environment. AVA4-ES100 is ideal for Public Address and wide distributed digital professional sound network systems. A set of 4 GPI and 4 GPO makes the AVA4-ES100 locally or remotely controllable. AVA4-ES100 integrates a configurable RS232 serial interface. AVA4-ES100 embeds AuviTran virtual tunnelling mechanism for connecting its local RS232 to another remote serial interface of an AuviTran or Yamaha ES100 device.