SilentJack is a silence/dead air detector for the Jack Audio Connection Kit.
Usage: silentjack [options] [COMMAND [ARG]...] Options: -c <port> Connect to this port -n <name> Name of this client (default 'silentjack') -l <db> Trigger level (default -40 decibels) -p <secs> Period of silence required (default 1 second) -g <secs> Grace period (default 0 seconds) -v Enable verbose mode -q Enable quiet mode
SilentJack runs COMMAND after silence has been detected for the given number of seconds. SilentJack then waits for the command the finish, and then wait for the grace period before detecting silence again.
SilentJack's input port must be connected to an output port before it will start reporting silence.
It is released under the GPL license.