Question: I am developing an iPhone app. here in my App I have included Google maps.I am showing the highlighted path in map.

Now my Question is how to calculate distance between two point as per path as Apple"s native map App is showing routes with distance. 

Thanks in Advance.

Answer: 
Under Linux you can use SWAMI (<http://www.swamiproject.org/>) to manage the soundfont file (in SF2 format).
You can write a program to do this. Use the RtAudio library and Fluidsynth to programmatically generate all the pitches that you want to play. When these pitches are generated, write them out as wave files. This program could be reused for any sound font from then on. You can find the libraries by using google.