The Singularity is basically the fuzz section from the Black Hole Symmetry, which is unique in sending the signal through a JFET transistor and then 3 silicon transistors before it gets distorted!

The Singularity retains the look and fun of the Desintegrate setting with a single output volume control and adds a 3-position toggle switch to cut the output Low-Pass filter at 3 different frequencies.

3-position switch: Low-Pass filter frequency at 1.5 kHz (BHS style), 3.3 kHz, 16 kHz.