title: ALSA tutorial required
body: <p>I am New to audio programming.I want to create small application which is capable of playing and gives volume control . I am using alsa-lib. </p>
  
  <p>I want to know what is the purpose of switch (ex.Master Playback switch), enum in mixer elements and what value should i set to those switchs .</p>
  
  <p>Please suggest me some tutorial for mixer settings as well as alsa programming .</p>