The main circuit theme follows in the footsteps of the "Mario Circuit" theme from Super Mario Kart by firing up the player for the hours of racing fun (and/or frustration!) with an upbeat, energetic tune.
The smooth, laid-back Sherbet Land is just perfect for an ice track.
Double Dash!! has one of the Mario Kart series' most popular Rainbow Road music tracks, which includes a Musical Nod to the Super Mario Kart version in the introduction and to the Mario Kart 64 version in the second half. This version was awesome enough to get into Brawl without being remixed at all.
And then someone thought up some lyrics for it and created this hilarious gem.
Appropriately for one of the more chaotic games in the series, the main circuit theme (heard in Mario, Luigi, and Yoshi Circuits) is one of the series' most energetic music tracks.
The boisterous music for Balloon Battle fits the anything-goes mayhem of multiplayer battle modes perfectly.
Baby Park creates an appropriately fairground-like atmosphere for course it accompanies.
Mario Kart DS keeps the trend of awesome Rainbow Road music going with yet another piece of music that conveys a real sense of achievement at having made it to this, the last track in the game. (It's also longer than it might first seem; the main tune actually plays twice before wrapping around, but with subtle differences the second time.)
The game's remix of GBA Sky Garden gives new life to the ethereal Super Circuit track.
GCN Luigi Circuit brings back the lively and just plain fun "main race theme" from Double Dash!!
Luigi's Mansion has an appropriately spooky theme for a track through the haunted house.
The music for Tick Tock Clock opens by imitating a ticking clock; however, the two voices play at slightly different speeds, and get further and further out of sync with each other to segue into an almost urgent music track befitting the often hectic races through the giant clock.
Airship Fortress follows the Mario games' long tradition of awesome music for airship levels.
Bowser's Castle has an appropriately sinister atmosphere for the obligatory journey through the twists and traps of the title castle.
Waluigi Pinball dials up the excitement and energy for a wild journey up and down a pinball table. The music is surprisingly catchy and well made, and it's very chaotic and unpredictable, like Waluigi himself. The icing on the cake: the sound effects on the Waluigi Pinball track (item box roulette, Lakitu displaying the lap number cards, passing another driver or taking the lead, etc.) are rendered in mock 8-bit sound.
The Brawl remix is completely awesome. It even takes sounds from the original version.
The fiddle-led music for DK Pass is surprisingly easy-going for the chaos that so often occurs on snow courses.
The Rainbow Road music delivers both the sheer awesome and the sense of finality again, this time complete with a Musical Nod to both the Mario Kart DS Rainbow Road music and the Good Egg Galaxy stage music from Super Mario Galaxy.
The first course, Luigi Circuit, is the first of several tracks to use the game's very catchy "main circuit" theme.
There's yet another deliciously sinister-sounding track for Bowser's Castle, complete with Musical Nod to the castle theme from Super Mario Bros. at the very beginning. It has the brutality and maliciousness of the other Bowser themes, but it seems to also display feelings of sadness and anger, representing a not usually seen side of Bowser: the lonely side.
Thwomp Desert has just the right balance of mystery and energy for a desert-based battle track.
Galaxy Colosseum tilts the scale more toward the mystery side, as befits a space-based battle course.
The whole game could probably go in here. For starters, EVERY track, except DK Jungle, Grumble Volcano, and Music Park, has a live recorded theme. Hell, even the title screen has some of the most awesome and fitting music in the series, and that's not even the beginning.
There's a section of a Nintendo Direct where you actually can see parts of the aforementioned title screen, Dolphin Shoals, and Moo Moo Meadows being performed live. It is awesome.
Mario Kart Stadium as the first track in the game really shows that you're in for a treat.
Toad Harbor's music really captures the feel of a casual drive through a beautiful seaside town, and almost makes you forget the chaos that you and up to eleven other racers are currently in.
A rave is probably not what comes to mind when you think Mario Kart music, and yet Electrodrome has everything in a song you'd expect to hear at an electronic music club, and it's amazing too.
Mount Wario's BGM probably has more effort put into it than any other track in the game. Much like the course itself, it doesn't repeat until the very end, meaning that almost two minutes of music, which gradually gets more intense and less relaxed as the race gets closer to the end, only plays once during any given race. The repeating bit, by the way, is probably the shortest music loop in the series, clocking in at about 15 seconds.
Dragon Driftway is the first original theme in the pack. Race through ancient China while the guitar is blazing, the bass is slapping, and the traditional Chinese instruments really set the mood in a piece that is highly reminiscent of the Chai Kingdom from Super Mario Land.
Mute City gives us an excellent track that blends the typical metal track of the F-Zero circuit with jazz elements in an excellent way. It gets even better when you notice that the coins are replaced with the refuel strips and that the race start theme and race results theme is taken straight from the original SNES version!
Wii Wario's Gold Mine returns with an updated anti-gravity section and the music has become much more whimsical and clear-sounding with a blazing banjo.
SNES Rainbow Road may be down-to-earth (literally) for its fourth round but the music is out of this world. The bouncy and energetic remix sounds new but still faithful to the original version!
Ice Ice Outpost, the second original theme. Compared to the energetic Mount Wario, this is the new, laidback, ice-themed track that we have been waiting for and what a treat it is to hear that sweet-sounding violin!
And last but not least, Hyrule Circuit, an absolutely beautiful and groovy medley of several tracks from The Legend of Zelda! Nintendo really knows how to do tributes right when you hear this music while racing through Hyrule Castle, passing through the Master Sword, and collecting Rupees!