I would recommend that you download the latest OSS source code at: http://developer.opensound.com/sources/testing/oss-v4.0-build1005rc1-src-cddl.tar.bz2
Follow the build instructions and see if the build 1005rc1 works better - we have identified a potential bug in the HDAudio drivers that is addressed in the 1005rc1. Building OSS is straight forward. All you need is Solaris11, Studio 11 or 12 and SUNWgawk. You may follow simple build instructions at the OSS Developer Forum at http://www.opensound.com/forum Can you kindly show us the output from ossinfo -v (or cat /dev/sndstat)? regards Dev Mazumdar regards Dev Mazumdar This message posted from opensolaris.org