1 files changed, 68 insertions, 6 deletions

diff --git a/client/index.js b/client/index.js
index 7a01b55..2b09f5f 100644
--- a/client/index.js
+++ b/client/index.js
@@ -7,6 +7,7 @@ import keys from './lib/keys'
 import color from './lib/color'
 import mouse from './lib/mouse'
 import output from './lib/output'
+import spectrum from './lib/spectrum'
 
 import { Hall } from './lib/hall'
 
@@ -34,9 +35,11 @@ let samplers = {}
 let sampler
 
 requestAudioContext( () => {
-  samplers.smash = new Sampler('samples/smash/g{}.mp3', 12)
+  // samplers.smash = new Sampler('samples/smash/g{}.mp3', 12)
+  samplers.earth = new Sampler('samples/earth/earth{}.wav', 20)
   // samplers.glass = new Sampler('samples/glass/0{}Particle.mp3', 20)
   // samplers.kalimba = new Sampler('samples/kalimba/380731__cabled-mess__sansula-08-c-raw.wav', 10)
+  sampler = samplers.earth
   samplers.choice = (m,n) => {
     const r = Math.random()
     if (r < m) return samplers.smash
@@ -45,7 +48,7 @@ requestAudioContext( () => {
   }
   Tone.Buffer.on('load', function(){
     console.log('all buffers are loaded.')
-    redraw()
+    // redraw()
   })
 })
 
@@ -59,19 +62,78 @@ function redraw(){
   draw.clear()
 }
 
+function manipulate(spec){
+  const data = spec.data
+  const sr = spec.sr
+  const fft_size = spec.fft_size
+  const fft_overlap = spec.fft_overlap
+  const spec_len = data.length
+
+  let i, j, u, v, _r, _i
+
+  let aa = []
+  for (i = 0; i < fft_size; i++) {
+    aa[i] = i
+  }
+  shuffle(aa)
+
+  let new_data = [], new_col, col
+  let bands = 2 << 4 
+  let band, band_index
+  let band_size = Math.floor(fft_size / bands)
+  for (i = 0; i < spec_len; i++) {
+    col = data[i]
+    new_col = new_data[i] = data[i].concat()
+    data[i][2] = 0
+    for (j = 0; j < fft_size; j++) {
+      band = Math.floor(j / band_size) * band_size
+      band_index = j % band_size
+
+      new_col[j] = col[ band + (band_size - band_index) ]
+
+      // spectrum inversion
+      // new_col[j] = data[i][ fft_size - j - 1]
+      
+      // erase mirrored half of fft
+      new_col[j + fft_size] = 0
+    }
+    new_col[2] = 0
+  }
+
+  spec.data = new_data //.reverse()
+  //   col = data[i]
+  //   for (j = 0; j < fft_size; j++) {
+  //     _r = j*2
+  //     _i = j*2+1
+  //     col[_r] = col[_r] / 2
+  //     col[_i] = col[_i]
+  //   }
+  // }
+}
+
 keys.listen(index => {
   // trigger(Math.random(), ((index+7) % SPEAKER_COUNT) / SPEAKER_COUNT, 0, samplers.smash)
-  const sample = samplers.smash.play(100, Tone.now(), output)
-  console.log(Tone.now())
+  const sample = sampler.play(100, Tone.now(), output)
   const buf = sample._buffer.get()
   if (! buf) return
   const pcm = buf.getChannelData(0)
   const sr = buf.sampleRate
   const duration = buf.duration
-  console.log(duration.toFixed(2) + " s.")
+  const spec = spectrum.toSpectrum(pcm, sr)
+
   draw.clear()
   draw.waveform(pcm)
-  draw.spectrum(pcm)
+  draw.spectrum(spec, 0, window.innerHeight/4 + 20)
+
+  manipulate(spec)
+
+  const audioBuffer = spectrum.fromSpectrum(spec)
+  const player = new Tone.Player(audioBuffer)
+  player.connect(output)
+  player.start(Tone.now() + pcm.length / sr)
+
+  // const new_spec = spectrum.toSpectrum(audioBuffer.getChannelData(0), sr)
+  draw.spectrum(spec, 0, window.innerHeight * 1/2 + 40)
 })
 
 mouse.register({