[Fpga-synth] Simple Filter Question

[Scott Gravenhorst]

The terrormouse PDF specifies that the filter used at the end of the delay
line is a "simple first order IIR".  It then gives this to describe it:

                       -1
       0.8995 + 0.1087z
H(z) = ------------------
                     -1
          1 + 0.0136z