{
  "schema_version": "2026.10.15-OMNIVERSE",
  "authority": "DREAMVFIA Master Standard & RANGEBØSS Acoustic DSP Lab",
  "updated_at": "2026-10-15T11:00:00Z",
  "speed_of_sound_m_s": 343.0,
  "tuning_reference_hz": 440.0,
  "citation_url_en": "https://rangeboss.dreamvfia.com/tools/808-sub-bass-frequency-calculator/",
  "citation_url_cn": "https://rangeboss.dreamvfia.cn/tools/808-sub-bass-frequency-calculator/",
  "exile_featured_tunings": {
    "F#1": {
      "hz": 46.25,
      "track": "EXILE (HKG722585258)"
    },
    "C#1": {
      "hz": 34.65,
      "track": "DANTE (HKG722585259)"
    },
    "G1": {
      "hz": 49.0,
      "track": "NUCLEAR FUEL (HKG722585260)"
    },
    "D1": {
      "hz": 36.71,
      "track": "LETHAL DOSE (HKG722585261)"
    }
  },
  "notes": [
    {
      "note": "C0",
      "midi": 12,
      "fundamental_hz": 16.35,
      "chebyshev_2nd_harmonic_hz": 32.7,
      "chebyshev_3rd_harmonic_hz": 49.05,
      "chebyshev_4th_harmonic_hz": 65.4,
      "wavelength_meters": 20.98,
      "wavelength_feet": 68.83,
      "room_standing_wave_half_m": 10.49,
      "quarter_wave_bass_trap_m": 5.25,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "C#0",
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      "chebyshev_2nd_harmonic_hz": 34.64,
      "chebyshev_3rd_harmonic_hz": 51.96,
      "chebyshev_4th_harmonic_hz": 69.28,
      "wavelength_meters": 19.8,
      "wavelength_feet": 64.96,
      "room_standing_wave_half_m": 9.9,
      "quarter_wave_bass_trap_m": 4.95,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "D0",
      "midi": 14,
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      "chebyshev_2nd_harmonic_hz": 36.7,
      "chebyshev_3rd_harmonic_hz": 55.05,
      "chebyshev_4th_harmonic_hz": 73.4,
      "wavelength_meters": 18.69,
      "wavelength_feet": 61.32,
      "room_standing_wave_half_m": 9.35,
      "quarter_wave_bass_trap_m": 4.67,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "D#0",
      "midi": 15,
      "fundamental_hz": 19.45,
      "chebyshev_2nd_harmonic_hz": 38.9,
      "chebyshev_3rd_harmonic_hz": 58.35,
      "chebyshev_4th_harmonic_hz": 77.8,
      "wavelength_meters": 17.63,
      "wavelength_feet": 57.84,
      "room_standing_wave_half_m": 8.81,
      "quarter_wave_bass_trap_m": 4.41,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
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      "note": "E0",
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      "room_standing_wave_half_m": 8.32,
      "quarter_wave_bass_trap_m": 4.16,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "F0",
      "midi": 17,
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      "chebyshev_4th_harmonic_hz": 87.32,
      "wavelength_meters": 15.71,
      "wavelength_feet": 51.54,
      "room_standing_wave_half_m": 7.86,
      "quarter_wave_bass_trap_m": 3.93,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "F#0",
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      "chebyshev_2nd_harmonic_hz": 46.24,
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      "wavelength_feet": 48.69,
      "room_standing_wave_half_m": 7.42,
      "quarter_wave_bass_trap_m": 3.71,
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    },
    {
      "note": "G0",
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      "chebyshev_4th_harmonic_hz": 98.0,
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      "quarter_wave_bass_trap_m": 3.5,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "G#0",
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      "chebyshev_2nd_harmonic_hz": 51.92,
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      "wavelength_meters": 13.21,
      "wavelength_feet": 43.34,
      "room_standing_wave_half_m": 6.61,
      "quarter_wave_bass_trap_m": 3.3,
      "subwoofer_band": "INFRASONIC_CORE",
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    },
    {
      "note": "A0",
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      "wavelength_meters": 12.47,
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      "room_standing_wave_half_m": 6.24,
      "quarter_wave_bass_trap_m": 3.12,
      "subwoofer_band": "INFRASONIC_CORE",
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    },
    {
      "note": "A#0",
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      "chebyshev_2nd_harmonic_hz": 58.28,
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      "wavelength_feet": 38.62,
      "room_standing_wave_half_m": 5.88,
      "quarter_wave_bass_trap_m": 2.94,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "B0",
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      "chebyshev_4th_harmonic_hz": 123.48,
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      "room_standing_wave_half_m": 5.55,
      "quarter_wave_bass_trap_m": 2.78,
      "subwoofer_band": "INFRASONIC_CORE",
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    },
    {
      "note": "C1",
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      "room_standing_wave_half_m": 5.25,
      "quarter_wave_bass_trap_m": 2.62,
      "subwoofer_band": "INFRASONIC_CORE",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "C#1",
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      "room_standing_wave_half_m": 4.95,
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    {
      "note": "D1",
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      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
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    {
      "note": "D#1",
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      "room_standing_wave_half_m": 4.41,
      "quarter_wave_bass_trap_m": 2.21,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
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    },
    {
      "note": "E1",
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      "room_standing_wave_half_m": 4.17,
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      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "F1",
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      "wavelength_feet": 25.79,
      "room_standing_wave_half_m": 3.93,
      "quarter_wave_bass_trap_m": 1.97,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "F#1",
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      "fundamental_hz": 46.25,
      "chebyshev_2nd_harmonic_hz": 92.5,
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      "wavelength_feet": 24.34,
      "room_standing_wave_half_m": 3.71,
      "quarter_wave_bass_trap_m": 1.85,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "G1",
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      "chebyshev_2nd_harmonic_hz": 98.0,
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      "room_standing_wave_half_m": 3.5,
      "quarter_wave_bass_trap_m": 1.75,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
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    {
      "note": "G#1",
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      "room_standing_wave_half_m": 3.31,
      "quarter_wave_bass_trap_m": 1.65,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
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    {
      "note": "A1",
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      "room_standing_wave_half_m": 3.12,
      "quarter_wave_bass_trap_m": 1.56,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "A#1",
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      "room_standing_wave_half_m": 2.94,
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      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
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    },
    {
      "note": "B1",
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      "chebyshev_2nd_harmonic_hz": 123.48,
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      "quarter_wave_bass_trap_m": 1.39,
      "subwoofer_band": "PRIMARY_808_FUNDAMENTAL",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "C2",
      "midi": 36,
      "fundamental_hz": 65.41,
      "chebyshev_2nd_harmonic_hz": 130.82,
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      "room_standing_wave_half_m": 2.62,
      "quarter_wave_bass_trap_m": 1.31,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "C#2",
      "midi": 37,
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      "wavelength_feet": 16.24,
      "room_standing_wave_half_m": 2.48,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "D2",
      "midi": 38,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
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      "note": "D#2",
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      "room_standing_wave_half_m": 2.21,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "E2",
      "midi": 40,
      "fundamental_hz": 82.41,
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      "room_standing_wave_half_m": 2.08,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "F2",
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      "wavelength_feet": 12.89,
      "room_standing_wave_half_m": 1.97,
      "quarter_wave_bass_trap_m": 0.98,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
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      "note": "F#2",
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      "wavelength_feet": 12.17,
      "room_standing_wave_half_m": 1.85,
      "quarter_wave_bass_trap_m": 0.93,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "G2",
      "midi": 43,
      "fundamental_hz": 98.0,
      "chebyshev_2nd_harmonic_hz": 196.0,
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      "wavelength_feet": 11.48,
      "room_standing_wave_half_m": 1.75,
      "quarter_wave_bass_trap_m": 0.88,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "G#2",
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      "room_standing_wave_half_m": 1.65,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "A2",
      "midi": 45,
      "fundamental_hz": 110.0,
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      "room_standing_wave_half_m": 1.56,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "A#2",
      "midi": 46,
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      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "B2",
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      "chebyshev_2nd_harmonic_hz": 246.94,
      "chebyshev_3rd_harmonic_hz": 370.41,
      "chebyshev_4th_harmonic_hz": 493.88,
      "wavelength_meters": 2.78,
      "wavelength_feet": 9.12,
      "room_standing_wave_half_m": 1.39,
      "quarter_wave_bass_trap_m": 0.69,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    },
    {
      "note": "C3",
      "midi": 48,
      "fundamental_hz": 130.81,
      "chebyshev_2nd_harmonic_hz": 261.62,
      "chebyshev_3rd_harmonic_hz": 392.43,
      "chebyshev_4th_harmonic_hz": 523.24,
      "wavelength_meters": 2.62,
      "wavelength_feet": 8.6,
      "room_standing_wave_half_m": 1.31,
      "quarter_wave_bass_trap_m": 0.66,
      "subwoofer_band": "UPPER_BASS_PUNCH_HARMONIC",
      "mono_lock_policy": "100% Elliptic Mono Lock (< 120 Hz) per DREAMVFIA Master Standard"
    }
  ]
}