Thank you for helping so far, but there are more problems yet. Because I could not find a pitch library, I downloaded the Tone library, and tried that. Where before in the code there was "pitches.h" I just changed pitches to tone and got a whole new set of error messages:
C:\Program Files (x86)\arduino-1.0.1\libraries\Tone\Tone.cpp: In member function 'void Tone::begin(uint8_t)':
Tone:117: error: 'bitWrite' was not declared in this scope
Tone:119: error: 'digitalPinToPort' was not declared in this scope
Tone:119: error: 'portOutputRegister' was not declared in this scope
Tone:120: error: 'digitalPinToBitMask' was not declared in this scope
C:\Program Files (x86)\arduino-1.0.1\libraries\Tone\Tone.cpp: In member function 'void Tone::play(uint16_t, uint32_t)':
Tone:194: error: 'OUTPUT' was not declared in this scope
Tone:194: error: 'pinMode' was not declared in this scope
Tone:290: error: 'bitWrite' was not declared in this scope
C:\Program Files (x86)\arduino-1.0.1\libraries\Tone\Tone.cpp: In member function 'void Tone::stop()':
Tone:357: error: 'digitalWrite' was not declared in this scope
Do you have any idea what's going on here?