David
Baron:
  What might be a jack-enabled equivalent of:
 /usr/bin/ogg123 -d alsa<1>   (<1>  is and ogg file, obviously)
 Preferrable would be something that will play through jack if the
 daemon be
 running, alsa not (mplayer can work this way but this is a bit heavy
 for a short file play, i.e., a signal from a program). 
 With pulseaudio, you can simply use ogg123, and you
 don't have to give any special options for ogg123,
 just write "ogg123<1>" and you'll get sound through
 jack.
 Pulseaudio has amazingly well-working jack audio drivers
 and alsa interfaces, so finally linux audio works
 without hassle for all programs all the time.
 This is the only modification I had to do to make it work:
 $ grep jack /etc/pulse/*
 /etc/pulse/default.pa:load-module module-jack-source
 /etc/pulse/default.pa:load-module module-jack-sink 
 Can you please clarify what you did?
 Did you add those lines above to a specifc file or did you just run grep
 and everything magically worked?