Please give some guides on developing a Sound Encryption and decryption as Application?

Answer 1

Are you sure you are asking about "sound encryption/decryption"?
Don't you mean "sound encoding/decoding"?

It's not the same thing: even if each organize/encode data in a special way, but first is for hidding/masking purposes, than second is just for storing purposes... ( to store the numeric information of a sound, you must follow one conventional format to be easily readed/writed/exvhanged )