If you did the mini lab or played with one of the Fourier analysis apps you should have detected a different Fourier spectrum for instruments or voices that were different, even when they were playing...If you did the mini lab or played with one of the Fourier analysis apps you should have detected a different Fourier spectrum for instruments or voices that were different, even when they were playing the same note. Notice that the fundamental frequency (the lowest frequency) is the same for both instruments (around \(230\text{ Hz}\)) so they are playing the same note, even though they will sound different.
