Thank you tuttut for the reply.
OK, I take the easy way you have mentioned.
One more question. I need to play a 5sec audio as a seamless loop:indefinitely .Though I am able to accomplish that with the "Bare minimum" you have provided,there occurs an audio glitch at the end-to-beginning of the file played. The file has perfect zero-crossing at the beginning and in the end.Could you please suggest anything to avoid this problem.
(My gadget: Ardiuno Atmega 328+LC studio SDcard breakout board).
Thank you again.