This small structure uses a third party distortion module, but is otherwise quite simple. It uses three TD_Driver modules set into different modes. I found the best ones were:
1) Analogue (a softer distortion, more akin to an overdriven valve pre-amp)
2) Digital (a harsher distortion, like a transistor “fuzz box”)
3) Tanh (a softer sound, that can be used as a saturator)
The “Drive” control is set with its Min/Max range set to Minimum 8 V and a Maximum of 40 V this give a nice useful range of effect from almost no distortion, to full blown clipping in the Analog and Digital modes.
The divide and inverter modules are used to control the output level when the Tanh mode is selected, otherwise the output can quickly exceed the default SE audio range causing unwanted (and very unpleasant) clipping. The divider is set with the Input2 plug set to 8. The divider/inverter circuit converts the +8 to +40 range to the correct voltage when applied to the +10V applied to the Input 2 plug of the Level Adj module to keep the audio signal level from the Tanh TD_Driver fairly constant in line with the other two modules.
Symmetry:
The symmetry control is set with a Minimum of -2.5 volts, and a Maximum of 2.5 volts, and fed to the input of each control. This allows us to control whether positive , negative or both polarity peaks are clipped. This allows us more control over the type of harmonics (odd/even) that are produced. The TD_Driver module does have asymmetric modes, but I found this method more effective and controllable than these built in modes.
HP Filter:
The 1 Pole HP filter in the output is in kHz/Volt mode, and set to a pitch of 0.001 to prevent any DC offset appearing in the output. we are really just using it as a DC blocker.
Note: Although I have used Sasha’s SVG controls for the design, you can use the controls supplied with SE just as well.
