##sine5

An experimental Theremin using a proximity sensor, an air sensor, and javascript.

here's a video for the brave of hearing.

This learning project mixes together some lovely open-source projects:

• Arduino for hardware IO.
• johnny-five for hardware interface w/javascript.
• socket.io for pushing sensor input to client
• W3C Web Audio API for sythesis (implemented in Chrome).
• D3.js for visualizing input.

Requirements:

• Arduino board w/ proximity sensor
• Chrome
• Node

To run without an Arduino board & sensors:
node app --noboard

---

###TODO:

• get a d3 real-time chart going with websockets
• get Arduino working
• get node talking to Arduino
• connect and communicate with proximity sensor
• map proximity data to sound frequency data
• volume: choose sensor and visualize data
• check if reverb works on mac because it doesn't on linux
• axis of chart should reflect something useful, or nothing
• ui for controls
• proximity sensor reading is coarse, latent, and kinda sucks. revisit when not pissed.

###TOLEARN:

• d3 syntax and approach
• dealing with a stream of real-time data

---

##helpful articles:

###arduino

• http://blog.markloiseau.com/2012/05/install-arduino-ubuntu/
• http://www.emanueletessore.com/how-to-setup-a-node-js-and-arduino-development-environment-under-ubuntu-server-12-04/
• http://playground.arduino.cc/Linux/Debian
• http://arduino.cc/playground/Learning/Linux
• https://github.com/rwldrn/johnny-five/
• http://stuartmemo.com/controlling-web-audio-api-volume-using-the-html5-slider-element/
• http://arduino.cc/en/Tutorial/Smoothing

local usb device:
cdc_acm 1-1.5:1.0: ttyACM0: USB ACM device
cdc_acm 2-1.3:1.0: ttyACM0: USB ACM device

permission issues fixed with:
sudo chmod a+rw /dev/ttyACM0
sudo echo 'asd' > /dev/ttyACM0
dmesg

###chart

• http://alignedleft.com/tutorials/d3/
• http://bost.ocks.org/mike/path/
• https://gist.github.com/1642980
• http://bl.ocks.org/mbostock
• http://alignedleft.com/tutorials/d3/an-svg-primer/

###synthesis

• http://chromium.googlecode.com/svn/trunk/samples/audio/wavetable-synth.html
• http://developer.apple.com/library/safari/#documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/PlayingandSynthesizingSounds/PlayingandSynthesizingSounds.html
• http://creativejs.com/resources/web-audio-api-getting-started/
• http://www.html5rocks.com/en/tutorials/webaudio/intro/
• http://alxgbsn.co.uk/wavepad/js/main.js

###frequency mapping

http://en.wikipedia.org/wiki/Audio_frequency
88 note piano is 27.5Hz (A0) - 4186.01Hz (C8)
middle C = 261.626Hz

approx sensor range:
cm 73 - 199
voltage 58 - 158

###piano

• https://developer.mozilla.org/th/demos/detail/html5-piano
• https://developer.cdn.mozilla.net/media/uploads/demos/M/i/MikeMnD/bbd077c574670ad3c70aab5aa64258be/html5-piano_1315774273_demo_package/index.html