From the Super Mario Wiki
Music Park (known as Melody Motorway in Europe and Australia) is the third course in the Flower Cup in Mario Kart 7. The course takes place on a winding road floating in space, containing several musical instruments, including a giant xylophone and piano as well as a giant tambourine that acts like a Mushroom Trampoline from Mushroom Gorge. All instruments make their own sounds when driven over or passed by. The course reappears in Mario Kart 8 as a retro track in the Leaf Cup.
Mario Kart 7
The course starts off with a road containing trumpets and a large violin. Following this is a piano turn, with two Big Piranha Plants planted near the end and surrounded by circles of light, near which is a small ramp sided with a Jump Block. These lights around the Piranha Plants are to be avoided by racers. Otherwise, the plants will bite, causing the victim's kart to tumble end over end. After xylophone and glockenspiel turns, the tambourine trampoline appears; here, the sides of the track are full of musical sound waves. Then there is a split road containing Bouncing Notes jumping side to side and 3 metronome beats are played just before they land from jumping. After one minute and fifty-two seconds have passed, they start to jump right after they land. After that there's a big turn with a smaller tambourine trampoline which can be used to cut the turn. After another left turn there's the finish line.
Any players that race beneath these notes will be flattened and spun around. However, if players are near one of the notes when it hits the ground, they will be launched into the air and can take advantage of the air time by gaining a short boost.
Mario Kart 8
Music Park returns as a retro course in Mario Kart 8 as the third track in the Leaf Cup. In this game, the course has ambient lighting, updated graphics, and shading. The Bouncing Notes now squint when hitting the ground and they no longer jump shortly after they land when one minute and fifty-two seconds has passed, but on the final lap their behavior is faster along with the metronome. In the area they are in, the metronome played is louder than before. A few additional coins have also been placed around the track. Small Bouncing Notes appear near the starting line, jumping in time with the music. Aside from the update in visuals and music, the track's layout remains the same as in the original, which is not seen in any other retro course in this game, except SNES Rainbow Road.
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