==== Tech Notes ====
pulse_lower_volume() scans through the list of running input sinks and
reduces the volume to 30% of original volume skipping over the stream
named 'mycroft-voice'
pulse_restore_volume() restores the volume again.
If activated with the 'pulseaudio' config parameter they will be called
when mycroft starts/stops listening and starts/stops speaking
==== Environment Notes ====
The Audio->pulseaudio configuration parameter can now be set to 'lower'
to activate this feature
==== Fixed Issues ====
#969
==== Tech Notes ====
The criteria for excluding messages were inverted and excluded all
messages containing 'mycroft.audio.service'. This criteria has been
fixed.
==== Documentation Notes ====
NONE - things like description of a new feature or notes on behavior
changes
==== Localization Notes ====
NONE - point out new strings, functions needing international versions,
etc.
==== Environment Notes ====
NONE - new package requirements, new files being written to disk,
etc.
==== Protocol Notes ====
NONE - message types added or changed, new signals, etc.
when the audio configuration option "pulseaudio" is set to mute running
audio streams will be muted while mycroft is speaking and while mycroft
is listening.