Breaking Down the Mario Level Clear Chord Progression

The Mario level complete music is basically one of the most overused harmonic loops in pop history played at 150 BPM with a very specific NES timbre. If you've ever tried to reharmonize it or figured out what's actually happening under the melody, you might be surprised by how textbook-unexciting it is. The original Super Mario Bros. level clear jingle runs a I-vi-IV-V7-I progression in the key it's written in, which is B major for the first game's version. Same bones as Heart and Soul. Same bones as about eight thousand other songs from the 1940s onward. In roman numerals, that cadence is just I6/4 - V7 - I, with the vi and IV acting as pre-dominant color before hitting the authentic cadence. The real reason it sounds like Mario and not just another doo-wop song is the voice leading and the melodic contour. Koji Kondo wrote the melody to outline the chords almost literally—each chord change hits on a beat, and the melody resolves downward by step on the V-I movement, which is what creates that "level done, everything is resolved" feeling. The bass moves root position on each change: B-G#-E-F#-B, which is about as standard as basslines get. That's it. There's no secret progression. No hidden Neapolitan. Just straightforward functional harmony executed with very clean melodic writing. I spent about three weeks trying to figure out why my arrangements of the Mario level clear theme always sounded flat compared to the original before I realized the NES chip does something that's really hard to replicate in a DAW. The APU pulse waves have this natural amplitude envelope where the leading edge of each note has a slight volume spike, and combined with the way the carrier wave interacts with the melody register, it creates a pseudo-harmonic richness that a basic square wave patch doesn't have. I was layering supersaws and whatnot trying to add warmth, and the fix was just to make the pulse wave duty cycle modulate slightly per note rather than holding a static 50%. Not that anyone asked, but that detail matters more than any harmonic choice you could make.

One thing people consistently get wrong when analyzing this cadence is the treatment of the vi chord. In the Mario level clear, the vi functions more like a predominant than a tonic substitution. It's doing heavy lifting toward the IV, not pulling away from the I. If you voice it as a vi6 or add a passing tone between the vi and IV bass notes, it sounds much more authentic to the original than a plain root-position vi. The original essentially treats it as a ii in disguise—the notes are close enough that in four-voice writing, you can voice-lead it either way, but functionally it's pull-forward, not pull-away. Another practical detail that trips people up: the V7 chord in the Mario theme rarely resolves to a plain I triad in the arrangements. Kondo tends to add the 9th or use a I6 chord as the resolution, which softens the cadential punch and makes it feel more like a gentle "good job" than a dramatic finale. If you're recreating this for a project and it sounds too final or too classical, try resolving to I6 or adding a sus2 tension on the final chord. It changes the whole character. The downside to relying on this progression is that it's so ubiquitous that any listener will recognize it within two bars. That's fine if you're going for nostalgia, but if you're trying to write something that feels fresh while using the same harmonic skeleton, you're going to need to change the meter, the tempo, or the melodic rhythm significantly. I've seen people try to pass this progression off as original in demo submissions and it doesn't work. The melody does most of the heavy lifting in making it sound like Mario—the chords alone sound like a stock accompaniment pattern. If you want to avoid the association, change the bassline to move in contrary motion or use inversion patterns that don't follow the standard root-position circle. That'll distance it from the original without losing the harmonic function.