{
 "name": "What psytrance measures like",
 "description": "Acoustic measurements of 24 Creative Commons psytrance recordings — kick decay and fundamental, spectral balance by band, centroid and crest — used to tune the Cyberdeck's synthesis instead of guessing. The audio was measured and deleted; these are facts about the recordings, not the recordings.",
 "licence": "CC BY 4.0",
 "attribution": "Cyberculture",
 "verified": "2026-09-03",
 "method": "Creative Commons psytrance from the Internet Archive, filtered on the licence field, decoded to a 30-second mono excerpt from the middle of each track, measured, then deleted. No audio is kept or redistributed; these are measurements of the recordings, not the recordings.",
 "targets": {
  "kick_decay_ms": 146.55,
  "kick_fundamental_hz": 66.7,
  "spectral_centroid_hz": 327.2,
  "crest": 3.95,
  "bands_pct": {
   "sub_20_60": 28.96,
   "low_60_150": 34.31,
   "lowmid_150_400": 11.04,
   "mid_400_1500": 7.22,
   "hi_1500_5000": 2.12,
   "air_5000_16000": 0.69
  }
 },
 "rows": [
  {
   "item": "jamendo-249525",
   "track": "01-1539200-Fortrecs-Toy Factory Nightshift.mp3",
   "bpm": 143.6,
   "kick_decay_ms": 92.9,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 432.3,
   "crest": 8.29,
   "bands_pct": {
    "sub_20_60": 0.0,
    "low_60_150": 11.15,
    "lowmid_150_400": 65.2,
    "mid_400_1500": 22.39,
    "hi_1500_5000": 0.69,
    "air_5000_16000": 0.54
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-249525"
    }
   ]
  },
  {
   "item": "jamendo-594873",
   "track": "01-2235453-Frank Schroter-Ragnaro_k.mp3",
   "bpm": 124.5,
   "kick_decay_ms": 203.2,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 232.9,
   "crest": 3.14,
   "bands_pct": {
    "sub_20_60": 51.95,
    "low_60_150": 31.87,
    "lowmid_150_400": 11.1,
    "mid_400_1500": 2.8,
    "hi_1500_5000": 1.06,
    "air_5000_16000": 1.21
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-594873"
    }
   ]
  },
  {
   "item": "jamendo-248908",
   "track": "01-1495762-virtual voodoo-Virtual Voodoo -Hyperdimensional Rubix Cube _Demo_ _new_.mp3",
   "bpm": 154.3,
   "kick_decay_ms": 104.5,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 1457.8,
   "crest": 4.73,
   "bands_pct": {
    "sub_20_60": 1.15,
    "low_60_150": 18.15,
    "lowmid_150_400": 1.15,
    "mid_400_1500": 43.19,
    "hi_1500_5000": 34.58,
    "air_5000_16000": 1.75
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-248908"
    }
   ]
  },
  {
   "item": "jamendo-192966",
   "track": "03-1753257-Deimos-Doomsday Funk.mp3",
   "bpm": 141.6,
   "kick_decay_ms": 72.6,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 216.0,
   "crest": 3.35,
   "bands_pct": {
    "sub_20_60": 26.98,
    "low_60_150": 58.05,
    "lowmid_150_400": 8.31,
    "mid_400_1500": 4.46,
    "hi_1500_5000": 1.55,
    "air_5000_16000": 0.64
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-192966"
    }
   ]
  },
  {
   "item": "jamendo-242296",
   "track": "01-1763751-emotional vapor-Laudamus nomen Vishnu.mp3",
   "bpm": 184.6,
   "kick_decay_ms": 293.2,
   "kick_fundamental_hz": 150.0,
   "spectral_centroid_hz": 310.4,
   "crest": 5.45,
   "bands_pct": {
    "sub_20_60": 0.0,
    "low_60_150": 0.78,
    "lowmid_150_400": 90.98,
    "mid_400_1500": 8.05,
    "hi_1500_5000": 0.19,
    "air_5000_16000": 0.0
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-242296"
    }
   ]
  },
  {
   "item": "jamendo-177318",
   "track": "02-1553051-MRVN Music-Du CaXia.mp3",
   "bpm": 161.5,
   "kick_decay_ms": 174.1,
   "kick_fundamental_hz": 116.7,
   "spectral_centroid_hz": 183.5,
   "crest": 5.73,
   "bands_pct": {
    "sub_20_60": 0.49,
    "low_60_150": 38.52,
    "lowmid_150_400": 58.43,
    "mid_400_1500": 2.52,
    "hi_1500_5000": 0.02,
    "air_5000_16000": 0.0
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-177318"
    }
   ]
  },
  {
   "item": "jamendo-117457",
   "track": "01-998524-Speedsound-PsySeeD _ Speedsound - Psy Fullon Loops and Samples.mp3",
   "bpm": 156.6,
   "kick_decay_ms": 81.3,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 336.0,
   "crest": 3.38,
   "bands_pct": {
    "sub_20_60": 34.54,
    "low_60_150": 49.7,
    "lowmid_150_400": 7.08,
    "mid_400_1500": 4.37,
    "hi_1500_5000": 1.99,
    "air_5000_16000": 1.94
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-117457"
    }
   ]
  },
  {
   "item": "jamendo-212189",
   "track": "01-1254745-Nebulis-Phanatoplexy.mp3",
   "bpm": 141.6,
   "kick_decay_ms": 119.0,
   "kick_fundamental_hz": 33.3,
   "spectral_centroid_hz": 134.7,
   "crest": 2.9,
   "bands_pct": {
    "sub_20_60": 36.75,
    "low_60_150": 52.65,
    "lowmid_150_400": 8.15,
    "mid_400_1500": 1.68,
    "hi_1500_5000": 0.33,
    "air_5000_16000": 0.37
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-212189"
    }
   ]
  },
  {
   "item": "jamendo-187109",
   "track": "06-1678278-ElfenKlang-Ambiance.mp3",
   "bpm": 149.8,
   "kick_decay_ms": 185.8,
   "kick_fundamental_hz": 83.3,
   "spectral_centroid_hz": 261.2,
   "crest": 3.84,
   "bands_pct": {
    "sub_20_60": 36.98,
    "low_60_150": 46.18,
    "lowmid_150_400": 11.51,
    "mid_400_1500": 1.78,
    "hi_1500_5000": 2.25,
    "air_5000_16000": 1.22
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-187109"
    }
   ]
  },
  {
   "item": "jamendo-144292",
   "track": "04-1199582-Ambient Samurai - Ichiro NAKAGAWA-Song For Answers Floating In the Farthest Atmosphere.mp3",
   "bpm": 191.4,
   "kick_decay_ms": 185.8,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 551.8,
   "crest": 5.65,
   "bands_pct": {
    "sub_20_60": 0.02,
    "low_60_150": 3.08,
    "lowmid_150_400": 26.92,
    "mid_400_1500": 69.07,
    "hi_1500_5000": 0.9,
    "air_5000_16000": 0.0
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-144292"
    }
   ]
  },
  {
   "item": "jamendo-136538",
   "track": "01-1136811-Speedsound-Ant-Alien - Sounds of Fullmoon.mp3",
   "bpm": 137.8,
   "kick_decay_ms": 287.3,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 323.7,
   "crest": 2.57,
   "bands_pct": {
    "sub_20_60": 59.39,
    "low_60_150": 25.42,
    "lowmid_150_400": 6.17,
    "mid_400_1500": 4.31,
    "hi_1500_5000": 2.49,
    "air_5000_16000": 2.19
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-136538"
    }
   ]
  },
  {
   "item": "jamendo-165248",
   "track": "01-1415382-Speedsound-Nava Sounds - Stem Pack Vol.1.mp3",
   "bpm": 120.2,
   "kick_decay_ms": 139.3,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 348.7,
   "crest": 4.19,
   "bands_pct": {
    "sub_20_60": 62.57,
    "low_60_150": 18.23,
    "lowmid_150_400": 7.33,
    "mid_400_1500": 7.4,
    "hi_1500_5000": 2.76,
    "air_5000_16000": 1.68
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-165248"
    }
   ]
  },
  {
   "item": "jamendo-355990",
   "track": "01-1465675-Yair Garcia-Neural Networks _Original Mix_.mp3",
   "bpm": 154.3,
   "kick_decay_ms": 69.7,
   "kick_fundamental_hz": 116.7,
   "spectral_centroid_hz": 658.0,
   "crest": 5.29,
   "bands_pct": {
    "sub_20_60": 18.4,
    "low_60_150": 56.25,
    "lowmid_150_400": 10.99,
    "mid_400_1500": 7.04,
    "hi_1500_5000": 2.3,
    "air_5000_16000": 4.96
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-355990"
    }
   ]
  },
  {
   "item": "jamendo-294073",
   "track": "01-1799169-MetaLafricana-Tribal Trip.mp3",
   "bpm": 120.2,
   "kick_decay_ms": 226.4,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 432.8,
   "crest": 8.02,
   "bands_pct": {
    "sub_20_60": 14.75,
    "low_60_150": 17.08,
    "lowmid_150_400": 26.84,
    "mid_400_1500": 38.39,
    "hi_1500_5000": 2.31,
    "air_5000_16000": 0.61
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-294073"
    }
   ]
  },
  {
   "item": "jamendo-256730",
   "track": "01-1388628-Libra Makowski-Libra Makowski - Nightmare.mp3",
   "bpm": 139.7,
   "kick_decay_ms": 243.8,
   "kick_fundamental_hz": 75.0,
   "spectral_centroid_hz": 773.1,
   "crest": 3.63,
   "bands_pct": {
    "sub_20_60": 2.97,
    "low_60_150": 54.38,
    "lowmid_150_400": 23.43,
    "mid_400_1500": 8.54,
    "hi_1500_5000": 5.0,
    "air_5000_16000": 5.6
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-256730"
    }
   ]
  },
  {
   "item": "jamendo-315397",
   "track": "01-1750856-decadency-Wanderer.mp3",
   "bpm": 184.6,
   "kick_decay_ms": 232.2,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 309.9,
   "crest": 3.61,
   "bands_pct": {
    "sub_20_60": 38.56,
    "low_60_150": 8.17,
    "lowmid_150_400": 30.57,
    "mid_400_1500": 21.63,
    "hi_1500_5000": 0.8,
    "air_5000_16000": 0.26
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-315397"
    }
   ]
  },
  {
   "item": "jamendo-239254",
   "track": "01-1591900-Emmit-______.mp3",
   "bpm": 139.7,
   "kick_decay_ms": 145.1,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 400.7,
   "crest": 3.61,
   "bands_pct": {
    "sub_20_60": 30.95,
    "low_60_150": 31.54,
    "lowmid_150_400": 11.81,
    "mid_400_1500": 18.29,
    "hi_1500_5000": 6.55,
    "air_5000_16000": 0.65
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-239254"
    }
   ]
  },
  {
   "item": "jamendo-450362",
   "track": "01-1875078-dj armas-01- Armas - Activate.mp3",
   "bpm": 145.6,
   "kick_decay_ms": 110.3,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 117.7,
   "crest": 2.93,
   "bands_pct": {
    "sub_20_60": 77.07,
    "low_60_150": 10.89,
    "lowmid_150_400": 6.05,
    "mid_400_1500": 1.8,
    "hi_1500_5000": 0.61,
    "air_5000_16000": 0.31
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-450362"
    }
   ]
  },
  {
   "item": "Pzyko-Skitzoform2009-2010Promo-album",
   "track": "06Pzyko-AngelOfDeath.mp3",
   "bpm": 159.0,
   "kick_decay_ms": 150.9,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 240.3,
   "crest": 5.09,
   "bands_pct": {
    "sub_20_60": 36.43,
    "low_60_150": 47.86,
    "lowmid_150_400": 4.75,
    "mid_400_1500": 5.24,
    "hi_1500_5000": 3.73,
    "air_5000_16000": 0.62
   },
   "sources": [
    {
     "url": "https://archive.org/details/Pzyko-Skitzoform2009-2010Promo-album"
    }
   ]
  },
  {
   "item": "KeepANotee.p.",
   "track": "FishermanSFriend-Viktor_vbr.mp3",
   "bpm": 147.7,
   "kick_decay_ms": 75.5,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 214.2,
   "crest": 2.67,
   "bands_pct": {
    "sub_20_60": 26.71,
    "low_60_150": 43.75,
    "lowmid_150_400": 13.47,
    "mid_400_1500": 3.66,
    "hi_1500_5000": 0.55,
    "air_5000_16000": 0.77
   },
   "sources": [
    {
     "url": "https://archive.org/details/KeepANotee.p."
    }
   ]
  },
  {
   "item": "FlowerPowderShantiTronic",
   "track": "Flower_Powder__ShantiTronic_64kb.mp3",
   "bpm": 143.6,
   "kick_decay_ms": 104.5,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 330.7,
   "crest": 3.11,
   "bands_pct": {
    "sub_20_60": 43.05,
    "low_60_150": 36.85,
    "lowmid_150_400": 6.02,
    "mid_400_1500": 9.22,
    "hi_1500_5000": 3.48,
    "air_5000_16000": 1.36
   },
   "sources": [
    {
     "url": "https://archive.org/details/FlowerPowderShantiTronic"
    }
   ]
  },
  {
   "item": "FlowerPowderFiveDropsep009",
   "track": "Flower_Powder__Five_Drops_ep009.ogg",
   "bpm": 145.6,
   "kick_decay_ms": 92.9,
   "kick_fundamental_hz": 33.3,
   "spectral_centroid_hz": 805.0,
   "crest": 4.06,
   "bands_pct": {
    "sub_20_60": 25.06,
    "low_60_150": 36.75,
    "lowmid_150_400": 5.33,
    "mid_400_1500": 21.5,
    "hi_1500_5000": 7.57,
    "air_5000_16000": 3.73
   },
   "sources": [
    {
     "url": "https://archive.org/details/FlowerPowderFiveDropsep009"
    }
   ]
  },
  {
   "item": "jamendo-531940",
   "track": "01-2063473-Hapishor-BRUH.mp3",
   "bpm": 129.2,
   "kick_decay_ms": 148.0,
   "kick_fundamental_hz": 66.7,
   "spectral_centroid_hz": 168.1,
   "crest": 4.66,
   "bands_pct": {
    "sub_20_60": 36.52,
    "low_60_150": 54.09,
    "lowmid_150_400": 5.94,
    "mid_400_1500": 1.82,
    "hi_1500_5000": 0.63,
    "air_5000_16000": 0.73
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-531940"
    }
   ]
  },
  {
   "item": "jamendo-265816",
   "track": "01-1495601-Mystik Prophet-Mystery.mp3",
   "bpm": 181.3,
   "kick_decay_ms": 333.8,
   "kick_fundamental_hz": 50.0,
   "spectral_centroid_hz": 842.1,
   "crest": 4.47,
   "bands_pct": {
    "sub_20_60": 2.12,
    "low_60_150": 2.35,
    "lowmid_150_400": 19.31,
    "mid_400_1500": 67.69,
    "hi_1500_5000": 8.3,
    "air_5000_16000": 0.18
   },
   "sources": [
    {
     "url": "https://archive.org/details/jamendo-265816"
    }
   ]
  }
 ]
}