Audio Monitoring

Capture Agent Live Audio Monitoring

Manchester has added live audio monitoring to it's CA monitor. Here are some details about how the underlying service is setup

The audio monitoring is provided via an Icecast2 - darkice (server - client) set up.

to install the Icecast2 server on RHEL 6:

• install the dependencies
  yum install curl-devel libtheora-devel libvorbis-devel libxslt-devel speex-devel

• install the EPEL packages
  rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

• yum install icecast

• configure the config file at /etc/icecast.xml

• service icecast start

On the client: compile darkice from source. https://code.google.com/p/darkice/ (for pulse audio support). current version 1.2:

• mkdir ~/darkice && cd ~/darkice

• wget https://darkice.googlecode.com/files/darkice-1.2.tar.gz

• tar -xvzf darkice-1.2.tar.gz

• cd darkice-1.2

• apt-get install build-essential libsamplerate0-dev libpulse-dev libaudio-dev lame libjack-jackd2-dev libasound2-dev libtwolame-dev libfaad-dev libflac-dev libmp4v2-dev libshout3-dev libmp3lame-dev

• ./configure --prefix=/usr/ --sysconfdir=/usr/share/doc/darkice/examples --with-alsa-prefix=/usr/lib/i386-linux-gnu --with-samplerate-prefix=/usr/lib/i386-linux-gnu --with-jack-prefix=/usr/lib/i386-linux-gnu --with-lame-prefix=/usr/lib/i386-linux-gnu --with-pulseaudio-prefix=/usr/lib/i386-linux-gnu -with-vorbis-prefix=/usr/lib/i386-linux-gnu

• make

• make install

• touch /etc/darkice.cfg

• edit darkice.cfg example [[ darkice.cfg ]]

• crontab -e

#start darkice (init.d script is broken)
*/1 * * * * /usr/bin/darkice -v 10 -c /etc/darkice.cfg