Fork of the http://www.pogo.org.uk/~mark/trx/ (C) Copyright 2012 Mark Hills [email protected]

See the COPYING file for licensing terms.

This software is distributed from the following URL:

http://www.pogo.org.uk/~mark/trx/

trx is a simple toolset for broadcasting live audio. It is based on the Opus codec http://www.opus-codec.org/ and sends and receives encoded audio over IP networks.

It can be used for point-to-point audio links or multicast, eg. private transmitter links or audio distribution. In contrast to traditional streaming, high quality wideband audio (such as music) can be sent with low-latency and fast recovery from dropouts.

With quality audio hardware and wired ethernet, a total latency of no more than a few milliseconds is possible.

The original version had a hardcoded SND_PCM_FORMAT_FLOAT constant as PCM sample format. First this constant is deprecated (see alsa-project.org for reference) and second float PCM sample format is quite unusual for current USB Audio Interfaces.

Currently changed this to hardcoded SND_PCM_FORMAT_S16_LE constant and moved from opus_encode_float() / opus_decode_float() to opus_encode() / opus_decode() to make libopus work with integer encoded PCM samples.

I'm going to make this tool more configurable in the future (e.g. configurable PCM sample format) as I'm going to use this a lot in one of my projects.