Greetings, I finally got OpenSound integrated with our Media Kit. Here is a screenshot under Haiku: http://revolf.free.fr/beos/shot_haiku_oss_working.003.png Here you can see in the node from MediaPlayer sending to the our system mixer then to the OpenSound media node, and it sending mic input to SoundRecorder. There are still some timing issue making it loose buffers sometimes, but it's usable. Recording works as well, and minimal mixer support. Record source selection is currently not working well because one has to select another one to actually unselect the current one, and I didn't yet find a way to reflect this correctly to the GUI apps, so they don't update the checkboxes yet. Here is the full patch against 070717: http://revolf.free.fr/beos/patches/oss-v4.1test0-070717-beos.diff.txt One should first build the media node manually as the build process only zips it without checking. cd oss-v4.1test0-070717-src-gpl/lib/opensound.media_addon/ make cd - mkdir build cd build $PWD/../oss-v4.1test0-070717-src-gpl/configure make build That should give you a oss-beos-v4.1test-bin.zip Test binary available at: http://revolf.free.fr/beos/oss-beos-v4.1test-bin.zip which should work in both BeOS R5 and Haiku (but make sure your kernel is from 03 aug or later). To install just unzip the file to the partition (/boot usually). I invite you to discover Haiku by visiting our website http://haiku-os.org/ and maybe downloading an image. Note QEmu and VMWare's es137x emulated cards should be picked up by OSS, but the test we ran in QEmu at least weren't really succesful, probably due to the timing issue I talked about. So meanwhile if you want to test OSS under Haiku you will have more luck on real hardware. Cheers, François.