Hi everyone, I have a problem and I dont't know where to ask my questions anymore, soI hope this mailing list can help me make progress with my problem.... I have a speaker set connected to an USB-Power-Plug (by which I can turnthe speakers on and off ) Now I want to detect, when the soundcard is in use and when not.(to turn the speakers on when needed...)(I am a C++ programmer so I can mess some things up) So my question is:Which way is best to detect wheather my sound card is in use or not ?Is there a general overview/documentation of the sound kernel moduleswhich describes the general relationship between them ?What would you do ? PLEASE help ! - Mit freundlichen Grüßen / Best regardsClaus Ilginnis _______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel