From 20d6ef7f907edd0b9f60b974e1ba24b5005fe7a4 Mon Sep 17 00:00:00 2001
From: Peter Prince <github@pcprince.co.uk>
Date: Thu, 13 Sep 2018 15:54:34 +0100
Subject: [PATCH] Add readme

---
 README.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/README.md b/README.md
index 6cdec8f..dfd9557 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,22 @@
 # wav-spectrogram
+A Node.js library for loading WAV files and drawing a spectrogram to a canvas.
+
+### Usage ###
+
+Load WAV file using a input object, read contents as an array buffer and pass to function with a canvas of the desired dimensions:
+```
+var fileInput = document.getElementById('file-input');
+var canvasElem = document.getElementById('spectrogram-canvas');
+
+var reader = new FileReader();
+
+reader.onload = function() {
+
+    var arrayBuffer = reader.result;
+
+    wavSpectro.drawSpectrogram(arrayBuffer, canvasElem, 'jet');
+
+};
+
+reader.readAsArrayBuffer(fileInput.files[0]);
+```
\ No newline at end of file