[orca-list] Per-application volume control

[Jason White <jason jasonjgw net>]

This question may have been answered before; if so, I apologize for raising it
again.

One of the advantages of PulseAudio is so-called "per-application volume
control". How do I use this with Orca and Speech-Dispatcher. Suppose I want to
play an audio file, for example from Firefox. I need to adjust the volume of
the audio that is playing without changing the volume of speech output from
Orca.

I'm using a braille display, so I can just turn speech off and adjust the main
volume, which would work well for me. However, it wouldn't work for everyone
and I'm curious to know how to adjust volume separately for Orca and for a
media player.

I'm running GNOME 3.14.