Talk:Homework: Sampling: A class review

I'm curious about the last sentence in your article "Once these values are recorded, there is alot more processing that is required to restore it to the original signal - at least close enough to the real thing that you can't hear the difference."

Could you please expand on this as I don't understand what additional processing is needed to output a waveform once you have the sampled values. When we did our embedded project we sampled data in, then simply repeated the data back out the DAC.