Taking a look at how
map() works in the Theremin quest circuit, you can start to understand how map works:
map(value, fromLow, fromHigh, toLow, toHigh); to
map(photoVal, 190, 1100, 150, 1500);
The first two values correspond to the photo light sensor, while the last two are the pitch. Try modifying the last two values (150 and 1500) up and down. You'll get different sounds every time!
You may have gotten annoyed with the spooky sounds coming out of your theremin. There are two ways to stop this sound.
One way to do this is with a push-button. Plug one into your breadboard and wire it up to Digital Pin 2:
Next, modify the Arduino code to call NoTone() when the button is pressed. We'll leave this up to you to figure out. One hint is to look at both the NoTone() documentation and CIRC07's code.