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bystep.clj
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bystep.clj
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(ns metasolfeggio.bystep
(:use
[overtone.live]
[overtone.inst.sampled-piano]))
(defn noise []
(* (rand) 0.0))
(defn chord-n [n chord]
(let [roots (iterate #(+ 12 %) 0)]
(take n (flatten (map (fn [root] (map #(+ root %) (sort chord))) roots)))))
(defn play-beat [metro beat notes]
(let [n (count notes)]
(dorun
(map-indexed (fn [i note]
(at (metro (+ beat (noise) (/ i n)))
(when note
(if (number? note)
(sampled-piano note)
(apply sampled-piano note)))))
notes))))
(defn play-piece [metro beat piece]
(dorun
(map-indexed (fn [i s] (dorun (map #(play-beat metro (+ beat i) %) s)))
piece)))
(defn map-note [f piece]
(map (fn [line] (map (fn [notes] (map f notes)) line)) piece))
(defn df [x]
(if (number? x)
[x 0 :x]
(if (nil? (rest (rest x)))
[(first x) (second x) :x]
x)))
(defn dfr [x]
(let [[n d _] (df x)] [n d :r]))
(defn adj [delta]
(fn [x]
(let [[n d] (df x)]
(let [nn (+ n delta)]
(if (< nn 1)
[(+ 7 nn) (- d 1)]
[nn d])))))
(def t
[[[6 5 4 3]]
[[4] [4 [7 -1] 2 4]]
[[4] [4 [3 -1] [5 -1] [7 -1] 3]]])
(defn p [t]
(concat
[[[[1 -1] [3 -1] [5 -1] 1 3]]]
[[[5] [5 [4 -1] [6 -1] 1 4]]]
t
(map-note (adj -1) t)
(map-note (comp dfr (adj -2)) t)
(map-note (comp dfr (adj -3)) t)
[[[1] [[1 -1] [3 -1] [5 -1] 1]]]))
(defn f [p root]
(let [s (vec (scale root :minor))]
(map-note (fn [x]
(let [[n d kw] (df x)]
(let [r (+ (s (dec n)) (* 12 d))]
(if (and (= n 7) (= kw :r))
(+ r 1)
r))))
p)))
(def piece
(let* [c1 (split-at 5 (chord-n 6 (chord :c4 :minor)))
f (conj (chord-n 4 (chord :f4 :minor)) (first (second c1)))
b (chord-n 3 (chord :bb4 :major))
e (conj (chord-n 4 (chord :eb4 :major)) (note :f5))
a (chord-n 3 (chord :ab4 :major))
d (conj (chord-n 4 (chord :d4 :dim)) (note :eb5))
g (chord-n 3 (chord :g4 :major))
c (conj (chord-n 4 (chord :c4 :minor)) (note :d5))]
[[(first c1)]
[(second c1) f]
[(map note [:ab5 :g5 :f5 :eb5])]
[(map note [:f5]) (cons (note :f5) b)]
[[(note :f5)] e]
[(map note [:g5 :f5 :eb5 :d5])]
[(map note [:eb5]) (cons (note :eb5) a)]
[[(note :eb5)] d]
[(map note [:f5 :eb5 :d5 :c5])]
[(map note [:d5]) (cons (note :d5) g)]
[[(note :d5)] c]
[(map note [:eb5 :d5 :c5 :b4])]
[[(note :c5)] (chord-n 6 (chord :c4 :minor))]]))
(defn level [v]
(fn [note] (if note [note v] note)))
(def piece2
(let []
(concat
(take 2 (repeat [(map note [:c4 nil :eb4 nil :eb4 nil])
(map note [:c4 nil :g4 nil :g4 nil])
(map (comp (level 2) note) [:g5 :g5 nil :f5 :g5 nil])]))
(take 2 (repeat [(map (comp (level 2) note) [:ab5 nil nil :f5 :eb5 :d5])
(map note [:d4 nil :f4 nil :f4])
(map note [:d4 nil :ab4 nil :ab4])]))
(take 2 (repeat [(map (comp (level 2) note) [:g5 nil nil :eb5 :d5 :c5])
(map note [:c4 nil :eb4 nil :eb4])
(map note [:c4 nil :g4 nil :g4])]))
(take 2 (repeat [(map (comp (level 2) note) [:f5 nil nil :d5 :c5 :b4])
(map note [:g3 nil :b3 nil :b3])
(map note [:g3 nil :d4 nil :d4])]))
(take 2 (repeat [(map note [:c4 nil :eb4 :eb4 :eb4 :eb4])
(map note [:c4 nil :g4 :g4 :g4 :g4])
(map (comp (level 2) note) [:c5 nil nil nil nil nil])]))
(apply concat (take 2 (repeat (concat
[[(let [s (map note [:g5 :f5 :eb5 :d5 :c5 :d5])]
(cons ((level 2) (first s)) (rest s)))]]
[[(map note [:d4 :f4 :f4 :f4 :f4])
(map note [:d4 :ab4 :ab4 :ab4 :ab4])]]
[[(let [s (map note [:f5 :eb5 :d5 :c5 :b4 :c5])]
(cons ((level 2) (first s)) (rest s)))]]
[[(map note [:c4 :eb4 :eb4 :eb4 :eb4])
(map note [:c4 :eb4 :g4 :g4 :g4])]])))))))
(defn change [x]
(if (<= (note :c5) x (note :b5))
x
(if (< x (note :c5))
(recur (+ x 12))
(recur (- x 12)))))
(def s (vec (scale :c5 :minor)))
(defn circle [d vs i n]
(if (> n 8)
'()
(let [v (vs (mod n (count vs)))]
(cons (map (fn [x]
(if x
(s (mod (+ (dec i) (dec x)) 8))
x)) v)
(circle d vs (+ i d) (inc n))))))
(def metro (metronome 64))
(comment
(play-piece metro (metro) (map-note change piece))
(play-piece metro (metro) (f (p t) :c5))
(play-piece metro (metro) piece)
(play-piece metro (metro) piece2)
(play-piece metro (metro) (map (fn [x] [x]) (circle 5 [[5 3 1] [1 2 3]] 1 0)))
(stop)
)