-- eggcrate (rd, 2007-04-23)
let cosu = cos . (* pi)
    sinu = sin . (* pi)
    eggcrate_f u v = cosu u * sinu v
    p = mce [64,72,96,128,256,6400,7200,8400,9600]
    dup f = (f (),f ())
    (x,y) = dup (\_ -> brownNoise kr)
    t = dust kr 2.4
    (f0,f1) = dup (\_ -> tChoose t p)
    f = linLin_b (eggcrate_f x y) f0 f1
    a = linLin_b x 0 0.1
in pan2 (mix (sinOsc ar f 0)) y a

-- eggcrate (rd, 2007-04-23) ; id
let cosu = cos . (* pi)
    sinu = sin . (* pi)
    eggcrate_f u v = cosu u * sinu v
    p = mce [64,72,96,128,256,6400,7200,8400,9600]
    bimap f (i,j) = (f i,f j)
    (x,y) = bimap (`brownNoiseId` kr) ('α','β')
    t = dustId 'γ' kr 2.4
    (f0,f1) = bimap (\z -> tChooseId z t p) ('δ','ε')
    f = linLin_b (eggcrate_f x y) f0 f1
    a = linLin_b x 0 0.1
in pan2 (mix (sinOsc ar f 0)) y a

-- eggcrate (rd, 2007-04-23) ; monad
uid_st_eval (do
  let cosu = cos . (* pi)
      sinu = sin . (* pi)
      eggcrate_f u v = cosu u * sinu v
      p = mce [64,72,96,128,256,6400,7200,8400,9600]
      clone2 x = x >>= \y1 -> x >>= \y2 -> return (y1,y2)
  (x,y) <- clone2 (brownNoiseM kr)
  t <- dustM kr 2.4
  (f0,f1) <- clone2 (tChooseM t p)
  let f = linLin_b (eggcrate_f x y) f0 f1
      a = linLin_b x 0 0.1
  return (pan2 (mix (sinOsc ar f 0)) y a))