i am trying to create a simple piano. Maybe six keys or so. I have never used a speaker before and am quite confused with trying to write a code. Could someone point me in a direction that would help me out, or show me how to write a code for one note to continuously play. If someone could show me that I think I could do the rest considering most of it is just switches to toggle on and off for the note.
Does any of this help...
not really that code does not work and I have no idea what is wrong with it
This should help:
I would then switch case code for what tone to play:
http://www.arduino.cc/en/Reference/SwitchCase
Hope that helps, 
Mowcius
I guess thins is what i want, but I am guessing that there is a "tone library" that i need to download. How would I go about doing so and installing it.
PS I am working with a mac.
#include <Tone.h>
#define SPEAKER 9
#define BUTTON 4
Tone tone1;
int buttonState = 0; //store value of button pin
void setup()
{
pinMode(BUTTON, INPUT);
tone1.begin(SPEAKER);
}
void loop()
{
buttonState = digitalRead(BUTTON);
if (buttonState == HIGH)
{
// play a tone, then wait for a bit before checking the button again
tone1.play(NOTE_A4);
delay(500); // 500 = 500 ms or 1/2 second
tone1.stop();
}
}
I think that this is what you are looking for then:
http://code.google.com/p/arduino-tone/
Before installing your first library, you'll need to create the libraries directory. Then, simply unzip the library into it. When you restart Arduino, the library should appear in the Sketch > Import Library menu. Any examples for the library should show up in the Files > Examples menu.
I have not used the arduino IDE on a mac but this is apparently what you need to do 
Mowcius