Hello. Since I haven´t got any awnser for the previous question, I decided to formulate a new one, perhaps with a better meaning of what I really need! I need to combine two waves that I created in two diferent functions. So, I have the function generate_sine_one and generate_sine_two with defferent frequencies and amplitudes. Ok, what I need is to find a way to combine these two waves. I been searching through alsa api in a effort to solve my problem but I couldn´t find a proper solution. Does anyone know a program or a tutorial where I could get some reference of this type of procedure? Tks a lot! _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel