Add demo gif to README.md

README.md

@@ -1,18 +1,27 @@
-# harmonic series generator
+# [harmonic series generator](https://thrly.github.io/harmonic-series/)
 
-_an synthesizer for exploring the harmonic series_
+_a synthesizer for exploring the timbre of the natural harmonic series_
 
+![generative wandering harmonic series](/harmonic-synth.gif)
 
-https://thrly.github.io/harmonic-series/
+> A harmonic is an integer multiple of a fundamental frequency. For example:
+> 
+> Fundamental (𝑓) is 55 Hz; 
+> Second harmonic (𝑓2) = 𝑓∗2= 110 Hz; 
+> Third harmonic (𝑓3) = 𝑓∗3= 165 Hz and so on...
 
+Listen: https://thrly.github.io/harmonic-series/
 
 ## Instructions
-1. Set a fundamental frequency (default 55 Hz) on top-right.
-2. Use the 'Start/Stop' button to turn audio on/off.
-3. Adjust the gain of each partial to mix harmonics.
-4. The 'Randomise' button (or R key) will set a random gain for each partial, creating new timbres.
-5. The 'Wander' button will start the partials automatically moving. Control speed with 'Wander Speed' slider.
+1. Open the synth: https://thrly.github.io/harmonic-series/
+2. Set a fundamental frequency (default 55 Hz) on top-right.
+3. Use the 'Start/Stop' button to turn audio on/off.
+4. Adjust the gain of each partial to mix harmonics.
+5. The 'Randomise' button (or R key) will set a random gain for each partial, creating new timbres.
+6. The 'Wander' button will start the partials automatically moving. Control speed with Wander slider.
+7. 'Static' stops generative behaviour.
+8. 'Save CSV' (bottom-right) exports information about harmonic pitch and amplitude (0-1) or current spectra.
 
-This instrument was made with p5.js
+This instrument was made with [p5.js](https://p5js.org/) and [p5.js-sound](https://github.com/processing/p5.js-sound)
 
 ~ oliver thurley, august 2024