feat: copycat NTO - La Clé des Champs algoraoke

Research + MIDI analysis of the original track:
- Key: Bb minor (harmonic minor dominant F)
- Arp from MIDI: 2-note 16th oscillation (Bf4/F4, order flips per chord)
- 16-bar cycle: Bbm(4) | F(4) | Bbm(4) | Ebm(4)
- Drums: 808bd+clubkick, h2o handclap, h2o hats (sparse offbeat)
- All melodic voices on MiOmi (bass, arp, pad, lead)
- Timbral faders for live "wider before drop" sweep (FM/detune/cutoff)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

copycat/la_cle_des_champs.tidal

+-- ============================================================
+-- COPYCAT: NTO - La Clé des Champs (2016)
+-- Algoraoke by ParVagues
+-- ============================================================
+--
+-- TRACK INFO
+-- ==========
+-- Artist: NTO (Anthony Favier), Hungry Music (HM17)
+-- Release: Sept 30, 2016 | Duration: 6:56
+-- BPM: 120 (Spotify/Tunebat) — Beatport says 113, adjust to taste
+-- Key: Bb minor (harmonic minor dominant) | Camelot 3A
+-- Genre: Deep house / melodic house
+--
+-- HARMONIC ANALYSIS
+-- =================
+-- Key: Bb natural minor (Bb C Db Eb F Gb Ab)
+--      with harmonic minor dominant (F major, not Fm → raised 7th = A natural)
+--
+-- Main chords:
+--   Bbm (i)  = Bb Db F    — tonic, home base
+--   F   (V)  = F  A  C    — dominant (harmonic minor), drives V→i cadences
+--   Db  (III) = Db F  Ab  — relative major, appears in extended sections
+--   Ebm (iv) = Eb Gb Bb   — subdominant minor, tension before resolution
+--   Gb  (VI)  = brief appearances
+--
+-- Primary vamp: Bbm | F alternating (4 bars each, ~8 seconds)
+-- Extended sections introduce Db and Ebm for variation/tension
+-- The V→i cadence (F → Bbm) is the main harmonic engine
+--
+-- (source: chordu.com chord detection with timestamps)
+--
+-- ARRANGEMENT (approx for 6:56 track)
+-- ====================================
+-- 0:00-1:30  INTRO     Filtered pad, atmosphere, gradual reveal
+-- 1:30-2:30  BUILD     Kick enters (4otf), bass creeps in, hat opens
+-- 2:30-3:30  GROOVE    Full drums, arpeggio enters, bass locked
+-- 3:30-4:30  MAIN      All elements, lead melody interplay
+-- 4:30-5:30  BREAK     Kick drops, pad swells, filter sweep tension
+-- 5:30-6:30  CLIMAX    Everything returns, peak energy
+-- 6:30-6:56  OUTRO     Elements strip away, reverb tails
+--
+-- ARPEGGIO (from MIDI: Nto- la cle des champs .mid)
+-- ==================================================
+-- Two-note 16th oscillation — dead simple, magic is in timbre:
+--   Bbm: Bf4 ↔ F4   (root + 5th, Bb on downbeats)
+--   F:   F4  ↔ Bf4  (SAME notes, ORDER FLIPS — F on downbeats)
+--   Ebm: Ef4 ↔ Gf4  (root + minor 3rd)
+-- Before ~4:30 breakdown: synth widens/brightens (more harmonics,
+-- phaser-like) then drops back → fm1/detune/cutoff on faders
+--
+-- SOUND DESIGN
+-- ============
+-- KICK:     808bd sub + clubkick body, 4otf
+-- BASS:     MiOmi sub (Moog-like FM), melodic through chord tones
+-- ARPEGGIO: MiOmi 2-note 16th oscillation, FM/detune/cutoff on faders
+-- PAD:      MiOmi detuned, generous reverb, slow filter
+-- HATS:     h2o velocity-layered, sparse offbeat + flourish
+-- CLAP:     h2o natural handclap, reverbed
+--
+-- NTO'S KNOWN GEAR:
+--   Moog Subsequent 37, Arturia MicroFreak, Akai APC40 MKII,
+--   Novation Impulse 49, DJ Tech Tools MIDI Fighter Twister,
+--   Akai MPD218
+--
+-- PRODUCTION STYLE (from interviews):
+--   "I love the 'human side' of electronic music. When the
+--    different elements sound autonomous and organic."
+--   Process is "really random" — may start from a concept
+--   (track, film, photo, emotion) or just experiment.
+--   Influences: Stephan Bodzin, James Holden, Paul Kalkbrenner
+--   "Deep basses and lysergic harmonies"
+--   Often asks real musicians to replay his software melodies
+--   for organic feel (e.g. Worakls on keys/guitar)
+--
+-- SOURCES:
+--   chordu.com, tunebat.com, musicstax.com, songbpm.com
+--   equipboard.com/pros/n-to
+--   deephouseamsterdam.com/interview-nto
+--   nexus.radio/news/10-questions-with-dj-and-producer-nto
+-- ============================================================
+
+do
+setcps (120/60/4)
+-- resetCycles
+let gF1 = (# djfbus 1 (range 0.05 0.95 "^49"))
+let gF2 = (# djfbus 2 (range 0.05 0.95 "^50"))
+let gF3 = (# djfbus 3 (range 0.05 0.95 "^51"))
+let gMask = (midiOn "^41" (mask "t . <f t f <f t>> <t f f <t f>>"))
+let gMute = (midiOn "^73" (mask "f*16"))
+let gMute2 = (midiOn "^74" (mask "f*16"))
+let gMute3 = (midiOn "^75" (mask "f*16"))
+let gM = gMask . gMute
+let gM2 = gMask . gMute2
+let gM3 = gMask . gMute3
+-- 16-bar chord cycle: Bbm(4) | F(4) | Bbm(4) | Ebm(4)
+-- Faders for live timbral control (the "wider before drop" sweep):
+--   ^34: arp FM1 depth    ^54: arp FM2     ^18: arp detune/width
+--   ^55: arp brightness   ^53: bass cutoff ^56: pad openness
+--   ^35: lead FM
+d1 $ gF1 $ gMute2 -- KICK: 808 sub + clubkick body, 4otf
+  $ midiOn  "^42" (<| "k k k <k k*2 k [~ k]>")
+  $ midiOff "^42" (<| "k")
+  $ "[808bd:2,clubkick:2]"
+  # lpf 5000
+  # gain 1.3
+d2 $ gF1 $ gM -- CLAP: h2o natural handclap, reverbed
+  $ midiOn "^43" (<| "~ cp ~ [cp <~ cp>]")
+  $ midiOff "^43" (<| "~ cp ~ cp")
+  $ "h2ogmcp"
+  # room (slow 32 $ range 0.3 0.6 saw)
+  # sz (slow 32 $ range 0.1 0.45 cosine)
+  # dry 1
+  # gain 1.1
+d3 $ gF1 $ gM -- HATS: h2o sparse offbeat + light flourish
+  $ midiOn "^76" (ply 2) -- double time on button
+  $ midiOff "^44" (mask "t(3,8)")
+  -- n: 0-4 closed Hard→Soft, 5-9 open, 15-19 semi-open
+  $ "~ h ~ h ~ h ~ <h!3 h*2>"
+  # "h2ogmhh"
+  # n "~ 3 ~ 2 ~ 4 ~ <3!3 [3 6]>" -- occasional open hat flourish
+  # gain "~ 0.7 ~ 0.8 ~ 0.65 ~ <0.7!3 [0.7 0.5]>"
+  # gain 0.85
+d4 $ gF2 $ gM3 -- BASS: MiOmi sub, melodic through chord tones
+  $ midiOn "^57" (rev)
+  $ midiOn "^89" (ply 2)
+  $ note (
+    slow 4 $ cat [
+      "bf2 ~ df3 ~ bf2 ~ f2 ~",    -- Bbm: root → m3rd, root → 5th
+      "f2  ~ a2  ~ f2  ~ c3 ~",    -- F:   root → maj3rd, root → 5th
+      "bf2 ~ df3 ~ bf2 ~ f2 ~",    -- Bbm
+      "ef2 ~ gf2 ~ ef2 ~ bf2 ~"    -- Ebm: root → m3rd, root → 5th
+    ])
+  # "miomi"
+  # fm1 0.08 # fm2 0
+  # level1 0.6 # level2 0.2
+  # omicutoff (range 0.25 0.5 "^53") -- fader: bass brightness
+  # reson 0.15
+  # room 0.15
+  # cut 4
+  # gain 1.3
+d5 $ gF3 $ gM3 -- ARPEGGIO: MiOmi 2-note 16th oscillation (from MIDI)
+  $ midiOn "^90" (stut 4 0.5 "e")
+  $ midiOn "^58" (|+ note 12) -- octave up
+  $ note (
+    slow 4 $ cat [
+      "[bf4 f4]*8",   -- Bbm: Bb on downbeats
+      "[f4 bf4]*8",   -- F:   F on downbeats (order flips!)
+      "[bf4 f4]*8",   -- Bbm
+      "[ef4 gf4]*8"   -- Ebm: Eb/Gb oscillation
+    ])
+  # "miomi"
+  # fm1 (range 0.05 0.6 "^34")  -- fader: FM depth → wider/brighter
+  # fm2 (range 0    0.3 "^54")  -- fader: FM2 → extra harmonics
+  # detune (range 0 0.4 "^18")  -- fader: stereo width / phaser-like
+  # omicutoff (range 0.4 0.95 "^55") -- fader: brightness
+  # level1 0.5 # level2 0.3
+  # reson 0.1
+  # room 0.3 # sz 0.4 # dry 1.2
+  # legato 0.4
+  # pan 0.6
+  # gain 1.1
+d9 $ gF2 $ gM3 -- PAD: MiOmi detuned warm bed
+  $ note (
+    slow 4 $ cat [
+      "[bf4,df5,f5]",    -- Bbm
+      "[f4,a4,c5]",      -- F
+      "[bf4,df5,f5]",    -- Bbm
+      "[ef4,gf4,bf4]"    -- Ebm
+    ])
+  # "miomi"
+  # detune 0.35
+  # level1 0.5 # level2 0.5
+  # fm1 0.02 # fm2 0
+  # omicutoff (range 0.3 0.6 "^56") -- fader: pad openness
+  # reson 0.2
+  # room 0.6 # sz 0.8 # dry 0.9
+  # legato 4
+  # pan 0.4
+  # cut 7
+  # gain 0.6
+d7 $ gF3 $ gMute3 -- LEAD: MiOmi counter-melody, high register
+  $ sometimesBy "^19" (superimpose (
+    (|+ note "[0,7]")
+    . (|+ pan 0.15)
+    . (# cut 91)
+  ))
+  $ midiOff "^58" (mask "t(2,4)")
+  $ note (
+    slow 4 $ cat [
+      "bf5 ~ df6 ~ f5 ~ df6 bf5",  -- Bbm
+      "c6  ~ a5  ~ f5 ~ a5  c6",   -- F
+      "bf5 ~ df6 ~ f5 ~ df6 bf5",  -- Bbm
+      "ef5 ~ gf5 ~ bf5 ~ gf5 ef5"  -- Ebm
+    ])
+  # "miomi"
+  # fm1 (range 0.1 0.4 "^35") -- fader: lead FM character
+  # fm2 0.1
+  # omicutoff 0.7
+  # level1 0.4 # level2 0.3
+  # room 0.5 # sz 0.7
+  # legato 1.5
+  # pan 0.7
+  # cut 9
+  # gain 0.85
+d10 -- RISER: Transition sweeps
+  $ struct "<~!14 t ~>"
+  $ "risers:8" # speed 0.25
+  # room 0.5 # sz 0.9
+  # cut 10
+  # gain 0.6