how to store wave or any other audio file into microcontroller flash or external flash .... after stroring file how to encode it to get in original form ...
I would have thought your teacher would not just have handed over that text, but also spent some time teaching you how to use a microcontroller, and how to read datasheets and how to write software.
.WAV files are typically composed of PCM sample data that can be simply written to a DAC at the appropriate rate.
".WAV files are typically composed of PCM sample data that can be simply written to a DAC at the appropriate rate."
But wouldn't it be almost too easy to just visit wikipedia and read up a bit on the format? Better continue to think of WAV data as black magic and hope to find some code that solves the problem without own involvement - investing own time has the danger of resulting in actual learning :p