Onda

import std/osc
import std/filter

params:
  freq = 110.0 {20.0, 880.0}
  cutoff = 1200.0 {40.0, 12000.0}
  resonance = 0.8 {0.1, 8.0}
  drive = 1.0 {1.0, 10.0}

def soft_clip(x):
  return tanh(x)

proc Saturator:
  params:
    amount = 1.0

  sample 4:
    out1 = soft_clip(in1 * amount)

init:
  osc = std::osc::Saw()
  filter = std::filter::Svf(cutoff = cutoff, q = resonance)
  saturator = Saturator()

block:
  filter.update_coeffs(cutoff, resonance)

  sample:
    tone = osc(freq = freq)
    out1 = saturator(filter(tone), amount = drive)