From 8001d09b576820595806ac4576eab4c3d6c5e0a1 Mon Sep 17 00:00:00 2001
From: Luke Murphy <lukewm@riseup.net>
Date: Fri, 7 Feb 2020 10:30:50 +0100
Subject: [PATCH] Record pitch, amplitude and duration

---
 voicegardens/static/voicegardens.js | 34 +++++++++++------------------
 1 file changed, 13 insertions(+), 21 deletions(-)

diff --git a/voicegardens/static/voicegardens.js b/voicegardens/static/voicegardens.js
index 389cdcf..d4c712e 100644
--- a/voicegardens/static/voicegardens.js
+++ b/voicegardens/static/voicegardens.js
@@ -50,11 +50,19 @@ var toScreenY = 0;
 // All shapes generated
 var shapes = [];
 
+// Sound properties
+var amplitude;
+var duration;
+var fft;
+var pitch;
+
 function record() {
   /**
    * Start recording a sound.
    **/
   if (microphone.enabled) {
+    fft = new p5.FFT();
+    fft.setInput(recorder);
     setTimeout(recorder.record(recording), recordingTimeout);
   }
 }
@@ -68,6 +76,11 @@ function stop() {
 
     // signal to the draw loop that we should generate a new shape
     newSoundJustRecorded = true;
+
+    // store sound properties from recording
+    pitch = fft.analyze();
+    amplitude = recording.getPeaks();
+    duration = recording.duration();
   }
 }
 
@@ -131,27 +144,6 @@ function setupRecording() {
   archiveButton.mousePressed(archive);
 }
 
-function getSoundInfo() {
-  /**
-   * Retrieve sound information like pitch, amplitude, duration, etc.
-   **/
-  amplitude = recording.getPeaks();
-  duration = recording.duration();
-
-  // pitch (frequency?) I think we can use fft.analyze() and then find the
-  // highest value (0 -> 1024) that has a non-zero value this gives us the
-  // highest frequency from the recording
-  // https://p5js.org/reference/#/p5.FFT
-  // https://p5js.org/reference/#/p5.FFT/analyze
-
-  // nuance?
-  // "I meant the amount of variation in the voice - i.e is it one single
-  // monotone note or does it go up and down octaves or start soft and high and
-  // become deep and guttural etc."
-  //
-  // How do to do this? Unsure ...
-}
-
 class GeneratedShape {
   constructor() {
     /**