A do it at home experiment which demonstrates the power of your senses and their interrelation.
Let someone hear a piece of (classical) music for 1 minute. After that, present the aroma of a lemon and ask to tap the original tempo from memory. Count the number of taps for exactly 30 seconds. Play the same music again. Then present the aroma of chocolate and ask again to tap the tempo from memory. Again, count the number of taps for 30 seconds. The smell of lemon will result in a higher number of taps than the aroma of chocolate.
Fresh spiky aromas tend to evoke memories from active moods, wheras dark warm aromas more often revive memories from relaxed and lay back moods.