VOICE

investigating generating tones and other sounds using arduino and small speakers .. thinking PWM .. From the start it would be nice if the ‘untitled device(s)’ could have a voice, even if that voice is quite tiny.

possibilities :

* arduino ‘core’ tone library –> would be nice and simple, but can only produce a single tone at a time.. so maybe not..

* Arduino Tone Library –> http://code.google.com/p/rogue-code/wiki/ToneLibraryDocumentation

[tone library needs a quick fix ( http://arduino.cc/forum/index.php/topic,87398.0.html ) open ‘Tone.cpp’ and change “wiring.h” to “Arduino.h”

Tone library on ATMEGA 328 based arduino can generate two tones before disrupting the boards inbuilt timing (e.g.: if you have 3 toned being generated it knocks out the delay( ) function.) so working on dual tones, which although they are not, they end up sounding like DTMF (analogue phone dialling  tones.. ( sort of funny as Jon Drummond is also developing work in this lab –> http://www.magnus-opus.sonicobjects.com/about.html )

EARS

http://littlebirdelectronics.com/products/breakout-board-for-electret-microphone [I don’t remember why I have this, but it was a quick and easy solution. As I have only one it is lucky that I have a number of electret microphones and opamp ICs ready if i need more]