ok, here's the result of my testing:
git clone git://pure-data.git.sourceforge.net/gitroot/pure-data/pure-data cd pure-data/src && autoconf && configure --enable-alsa --enable-jack && make cd ../bin ./pd -rt -alsa -alsaadd default
go to Media, Preferences, Audio Settings... Input device 1: choose default Output device 1: there's no default here, only (hardware/plug-in), ah ok now there's one but named \x95!\x19
I now see pd in PulseAudio Volume Control: Alsa plug-in [pd]
but not for long: tried but couldn't sync A/D/A tried but couldn't sync A/D/A tried but couldn't sync A/D/A audio I/O stuck... closing audio
if not using -rt, i can hear some audio, but very glitchy for about 15 seconds. same error.
anyone can test out, maybe it's my setup! pat