VFE Pedals Pinball tilt equalizer

A tilt equalizer blends between a signal path that is bass-heavy (LPF) and another signal path that is treble-heavy (HPF). The Big Muff's tone control is a tilt equalizer, and changes to this EQ circuit accounts for much of the difference in the various versions of the Big Muff. Tilt EQs are often used in mastering applications, as they are great tools for balancing the overall tonal response, both of individual instruments and full mixes. The Pinball is the most flexible analog tilt equalizer in pedal or studio gear format (if you've seen a more flexible one, let me know!).

• HPF sets the cutoff frequency of the high pass filter (bass cut). A higher frequency setting results in a more aggressive bass cut.
• LPF sets the cutoff frequency of the low pass filter (treble cut). A higher frequency setting results in a less treble cut.
• LEVEL sets the gain of a clean, post-EQ, makeup gain circuit. Up to +20dB of makeup gain is available through this control.
• BLEND mixes between the high pass (HPF) and low pass (LPF) filters. For a brighter tone, turn towards the HPF. For a darker tone, turn towards the LPF.
• The 6dB / 12dB switch sets the slope of each filter. For example, setting the HPF at 400Hz in the 12dB position, the frequency response would be -12dB @ 400Hz, -24dB @ 200Hz, -36dB @ 100Hz, etc.
• The "secret" center position of the toggle switch combines a 12dB/octave high pass filter with a 6dB/octave low pass filter.