New Post: How to code circullar buffer to create a delay and used the wavein for micrcophone and output to speaker?

Sorry but I think that I could not define the question well.

I am routing waveIn input to waveout device at real time.

Then after I want to listen 15 seconds history so I want to roll back to 15 seconds back and listen history for 15 seconds. (I can loose real time data while listening history). 

I think that BufferedWaveProvider buffers the desired length of data with BufferDuration property.  

So in this case I only want BufferedWaveProvider to provide me a buffer (for waveOut device) that is from history of n seconds instead of latest.

İs this possible?