the SDK. The legacy API OSS is not supported by the kernel, but ALSA has an OSS emulation system, which works for most purposes. For the audio APIs??? documentation, see the GStreamer web site[23], ESound white paper[9] and ALSA project???s web site[1]. More in-depth material is available in the Multimedia Architecture guide[59]. [1] Alsa project???s home page. http://www.alsa-project.org/. [9] Esound white paper. http://developer.gnome.org/doc/whitepapers/esd/. [23] Gstreamer project???s home page. http://gstreamer.freedesktop.org/. [59] Multimedia architecture. http://maemo.org/development/documentation/ how-tos/4-x/multimedia_architecture.html. Good luck with the hacking - more and better VOIP is needed! Paul