The initial schematic is finished and hosted as an LTSPICE IV file on github. The schematic is currently quite a typical distortion effect and so will require further adaptation in future iterations, but the aim of this iteration is to get a range of operation that sounds musically pleasing. This will require a secondary breadboarding stage to the work done with SPICE.

The current layout is:

• Input Buffer
• Transistor saturation stage
• Blend control between a hipass filter and a diode saturator.
• Output buffer

The blend control idea comes from Jack Orman @ muzique.com where there are a large number of takes on using diodes for saturation. Definitely worth a read!