Music and Computers

Transpose using Multiply and Add

Let's try two ways of modifying the frequencies of a familiar melody. We can add a value to the frequencies, or we can multiply the frequencies by a value.

new_frequency = (original_frequency * A) + B

Try each technique and hear which sounds more natural.

To Do:

Move the Add fader then leave it and listen to the entire melody.
Notice the melody sounds squeezed or stretched.
Hit the reset button to restore the original values.
Move the "Multiply" fader then leave it and listen to the entire melody.
Notice that the melody sounded like the same song, just higher or lower.