This is for an audio project and I want to use the LDRs to trigger a note on or note off.
Yes but you will have to do some measurements and testing to get them set up.
Put the LDR between the digital input and the +5V. From the input also connect the wiper of a pot, connect one of the ends of the pot to grouns and leave the other end unconnected.
Put the light on and adjust the pot so that it is on the edge of reading a zero or a one and leave the pot on the side that gives you a one.
Then cover the LDR and you should read a zero.
Now remove the pot and without turning it measure the resistance you had between input and ground. Replace the pot with a fixed resistor of this value.
This will work but it will not be very tolls rent of variations in light level.