title: What is the smallest audio file format?
body: <p>I know this is not a specific programming question but I hope someone can give me a suggestion. My applications (iPhone and Blackberry applications) use a lot of audio files. I need a solution for my applications in order to save some spaces. </p>
  
  <p>Is it right that .aac is the most suitable audio format for iPhone? Is it the smallest one? It it also suitable for Blackberry?</p>
  
  <p>Is there any way to make the audio files smaller without losing a lot of quality of the sounds? How about the bitrate, sampling freq and channels? Are they really matter?</p>