Hi there!
First off: incredible effort on your side implementing this feature into the XBMC world. Thank you!
I'm mostly an oldtimer from the old XBMP age (XBOX) and now using XBMC for all kinds of things. To cut the long story short: I also tried using XSqueeze in combination with Openelec (Nightly: OpenELEC-ION.x86_64-devel-20130217182054-r13335), but what I got was "no sound" when using "Squeezelite" player on the machine. Movies & other streams had no problem with that.
The setup:
ZOTAC ZBOX ID 84 Plus
Openelec 64-bit ION nightly (see above)
Installed ActivePerl + Logitech Mediaserver (on the same machine, "perl ./slimserver.pl" (as "root", group "root"))
Installed your addon + commons (manually, same error >> no files in repo, seems to be a nightly issue; worked fine with RC3)
Sound output via HDMI (channels 2.0 to TV)
Checked "chmod +x", everything fine so far & muted selection/navigation sounds in XBMC. Started XSqueeze, tried to start a radio channel: no sound via TV speaker (> silence). When starting the same radio channel via server on other Squeezeboxes in my apartement I could listen to sweet music.
I have no explanation for that, although I read there were problems with ALSA in older OE builds (that's why I switched to nightlies).
I enabled DEBUG in XBMC, restarted the box and tried everything again. So here's the log file:
http://storage.nordinary.com/OpenELEC-IO...mc_log.rar
Thank you for your help!