Such "LAD Gems" doc would be much needed here too. (For audio dsp gems, take a look at "musicdsp.org".) I would appreciate if somebody would take a look at Ardour and document best gems found there. E.g., the GUI and audio thread separation and start up sequences. Likewise for Linuxsampler and one of its GUI frontends. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software