Reiss Parametric EQ

Single-band parametric EQ with seven filter shapes selectable at runtime: low-pass, high-pass, band-pass, notch, low-shelf, high-shelf, peaking.

Source: reiss-mcpherson-parametric-eq/.

#What it demonstrates

• Biquad coefficient generation for the seven filter shapes
• Mode switch via EnumParam
• Frequency / Q / gain controls shared across shapes