[sdiy] integrator / capacitor leakage

[Grant Richter]

>
>         I have a feeling you may not be able to avoid the  
> programming part.  You can also do this with FPGA's.  Big trouble  
> is, there are no inexpensive eval boards with Audio Converters.   
> You would still need to use either Verilog or VHDL to program them.
>
>

Xilinx supports a schematic capture interface, using their tools.  
They bought the old SuzieCAD package.