I'm trying to create a delay with diffusion, as in TapeEcho of Reason. Instead of using allpass I tried to use a delays as the first reflections of the reverb described in "The Theory and Technique of Electronic Music" http://crca.ucsd.edu/~msp/techniques/latest/book-html/node124.html
The result is a good blur, but if I want to make a feedback the signal returns clean at the first echo. How can I avoid this?
Thanks in advice!