{
  "description": "Tuned comb filter: rings any sound at a note or frequency, from a subtle metallic sheen to a singing, pitched resonance. Flip the polarity for a hollow tone an octave down; damping softens the ring.",
  "id": "org.sournd.filter.kammerl",
  "kind": "filter",
  "latency": 0,
  "name": "Kammerl",
  "params": [
    {
      "default": 0.0,
      "key": "tuning",
      "max": 1.0,
      "min": 0.0,
      "name": "Tuning",
      "taper": "linear",
      "unit": "",
      "abi_id": 0
    },
    {
      "default": 57.0,
      "key": "note",
      "max": 96.0,
      "min": 24.0,
      "name": "Note",
      "taper": "linear",
      "unit": "note",
      "abi_id": 1
    },
    {
      "default": 0.0,
      "key": "fine_cents",
      "max": 100.0,
      "min": -100.0,
      "name": "Fine",
      "taper": "linear",
      "unit": "cents",
      "abi_id": 2
    },
    {
      "default": 220.0,
      "key": "freq_hz",
      "max": 5000.0,
      "min": 30.0,
      "name": "Frequency",
      "taper": "log",
      "unit": "Hz",
      "abi_id": 3
    },
    {
      "default": 70.0,
      "key": "feedback",
      "max": 95.0,
      "min": 0.0,
      "name": "Feedback",
      "taper": "linear",
      "unit": "%",
      "abi_id": 4
    },
    {
      "default": 0.0,
      "key": "feedforward",
      "max": 100.0,
      "min": 0.0,
      "name": "Feed-forward",
      "taper": "linear",
      "unit": "%",
      "abi_id": 5
    },
    {
      "default": 0.0,
      "key": "polarity",
      "max": 1.0,
      "min": 0.0,
      "name": "Polarity",
      "taper": "linear",
      "unit": "",
      "abi_id": 6
    },
    {
      "default": 9000.0,
      "key": "damping_hz",
      "max": 20000.0,
      "min": 500.0,
      "name": "Damping",
      "taper": "log",
      "unit": "Hz",
      "abi_id": 7
    },
    {
      "default": 0.0,
      "key": "spread_cents",
      "max": 50.0,
      "min": 0.0,
      "name": "Spread",
      "taper": "linear",
      "unit": "cents",
      "abi_id": 8
    },
    {
      "default": 100.0,
      "key": "mix",
      "max": 100.0,
      "min": 0.0,
      "name": "Mix",
      "taper": "linear",
      "unit": "%",
      "abi_id": 9
    },
    {
      "default": 0.0,
      "key": "output_db",
      "max": 12.0,
      "min": -24.0,
      "name": "Output",
      "taper": "linear",
      "unit": "dB",
      "abi_id": 10
    }
  ],
  "provenance": "Original sOURnd design blending general techniques: a fractional-delay feedback comb with a one-pole damper in the loop (its group delay compensated in the tuning), a feed-forward tap, polarity inversion and noise-power normalisation.",
  "styles": [
    "comb"
  ],
  "tail_seconds": 8.0,
  "version": "1.0.0",
  "tier": "free",
  "listed": true,
  "category": "filter",
  "url": "https://sournd.com/engines/kammerl/",
  "price": {
    "cents": 0,
    "currency": "GBP"
  },
  "markdown_url": "https://sournd.com/engines/kammerl/index.md",
  "icon_url": "https://sournd.com/engines/kammerl/icon.svg",
  "banner_url": "https://sournd.com/engines/kammerl/banner.svg",
  "story": "Any sound, made to ring.",
  "release_on": "2026-11-12",
  "download": {
    "macos": "https://sournd.com/download/free/macos",
    "linux": "https://sournd.com/download/free/linux",
    "windows": "https://sournd.com/download/free/windows"
  }
}