+- add threading API
+- add support for auth using SCM_CREDENTIALS
+- include hw description in sink/source info
+- use scatter/gather io for sockets
+- hw volume support for alsa, oss-mmap, windows, solaris
+- notifcation on hw volume change
+- source volume control
+- deal with underflows reported by OSS/ALSA properly
+- mute switch support (like ALSA does it)