For my assignment, I began experimenting with tapin/tapout and line~. Through experimentation I learned that, when you change the parameters of line~, there is a pitch shift to transition into the new delay. I used a random number generator and zl reg to setup a patch where, whenever line~ reached its desired delay, its goal  would be changed again and its start would be set to the previous end, resulting in a delayed pitch shift at the output.

Next, I incorporated feedback using the same method with a shorter delay and an input that would get progressively quieter (so as to not trample my original sound in an explosive manner). The output of my patch is a version of the audio with a distinct echo and pitch shift, below are the results for the song I used.