In my last lab report I discussed the importance of the basic digital delay, how it was created and how it is used in music, film, and even in scientific experiments. I explained the use of FIR and IIR comb filters to create feed forward and feed back loops in order to create a natural sounding delay. In this report Im going to take it to the next level and talk about delay based modulated effects. It is important to replicate these delayed sounds in a realistic way and realistic way to let the listener know what is happening, rather than having an unnatural sounding output. By using a mix of acoustical phenomena and digital algorithms, a digital system will be able to take an input signal and replicate some of these sounds caused by a “digital delay” and modulation.