Biquad

• bi quadratic IIR filter =
• 4 = states
  • 2 previous input
  • 2 previous output
• 5 - coeffs
  • 4 states
  • 1 b0 for current output

EQ

• https://webaudio.github.io/Audio-EQ-Cookbook/

Ramp

• volume knob updated only once per sample rate
• “skrrr” sound = discontinuum between the previous buffer with volume and new buffer with new volume
• Should use ramp