I'm using the "Arduino for Audio" Daisy Seed by Electrosmith( ) to emulate multihead echos from the past. The software is Plug Data ( ) which is a visual programming environment based on Pure Data which not only has a vastly improved interface but can compile and load to the Daisy Seed directly. Which is a huge plus when you are DSP Noob of the highest order such as myself. Special Thanks to @SoundSimulator and the great folks on the Daisy Seed and PlugData Discords. Also to @QCGInteractiveMusic for invaluable information on Pure Data.