Deconstructing the deadmau5 Sound and Music


I really admire deadmau5 and his excellent music, including his use of chords and arps. He has a knack for it. I’ve watched him create on Masterclass and he just knows what he is doing.

Well, I wanted to know too, so I deconstructed some of his music, his chord progressions, and arpeggios. I’ll be adding more as I learn more, so stop back and check the “last updated” text below.

Last updated: 23-March-2018

Base Material to Start

Splice offers some of deadmau5’s MIDI files, so I got one that has both a melody and an accompanying arpeggio – both made by deadmau5. This is what I initially analyzed.

I could have used any of the MIDI files out there with his music, but I wanted something that I absolutely knew was written and came from him. Splice has this and it is direct from deadmau5 himself.

Chords Deconstruction

To make it easier for me, I used Cthulhu, the chord and arpeggio machine made by Steve Duda with/for deadmau5. The chord section allows input of a MIDI file or reading from the piano roll (FL Studio) in a kind of “learning” mode. It then assigns the chords it reads to consecutive keys on the keyboard.

I just played the deadmau5 MIDI file of chords while Cthulhu read them in. Then I could play them from the keyboard. Better yet, Cthulhu identified the chords for me.

So that’s interesting. It is a chord progression of F# fifth (basically a F# chord missing one note), C# minor, A major, B major, F# major, then repeating. But, C# minor, A major, and B major are the same chords but with different notes of the chords in the two instances.

An observation about the eight bars above: Important here is that the beginning and end of the two four-bar patterns have the same F# fifth and F#major that match each other every time. No different notes used in these chord instances.

So basically, the “seams” match. In chord/music theory these chords are sometimes called “cadence chords.” This is what makes the repeating pattern match seamlessly yet sound different in the middles. In the picture here these are the chord sets that are outlined by blue boxes. Picture the pattern repeating again and again to the right and you will see that each is joined by the Fmaj and F#5 next to each other and in exactly the same pattern of notes. F# and F#5 only differ by one note being left out of the F#5, so these two chords are very closely related.

deadmau5 says that the pattern “resolves.” I like that terminology as well as the “cadence chord” term. I think “resolves” is better because it isn’t just limited to chords, but can apply to the melody as well.

Further analysis shows that this is probably the key of G# minor. In this key, the chords are as follows:

VII = F# (with F#5 closely related as described above)
iv = C#min
flat-II = Amaj (note this chord is “borrowed” from another mode)
III = Bmaj

The A major chord is what threw me off a bit. It is borrowed from another mode and fits nicely with this chord progression.

Maybe more interesting is the sequence: Major, Minor, Major, Major, Major.

Next, notice that there is a whole set of lower notes that are kind of segregated from the higher ones. These are part of the chords and are octave-separated notes of the base chords. In other words, the basic chords are up above and additional repeated lower notes of the chord follow along at the bottom, making the bassline. In the picture, these bass notes are the ones below the red line.

deadmau5 mentions this in his Masterclass that I would highly recommend you take if given the chance.

Note that they are all the same pattern without any variation as there are in the upper notes. This makes a nice, regular bass track. Imagine the regular, rhythmic thumping of the bassline. You don’t want variation in there.

To sum up the chord portion. here is a picture of the parts identified.

The progression of F#5, C#min, Amaj, Bmaj, F#maj did not line up with any of the chord progression charts I was able to find. However, it is close to the key of A in the Lydian mode. It also has a pattern of major, minor, major, major, major. I think it is important to note the deadmau5 says he works with his music until it sounds right to him. And this is key because this is important and it is why his music sounds like his music. To deconstruct it further would probably do a disservice to it and to him. It is artistry if you ask me.

Another thing I observed about Cthulhu itself was located in the chord menu. There are options for

  • making all chords suspended,
  • making major chords minor,
  • making minor chords major,
  • using the lower note of the chord as root
    • 1 octave down, and
    • 2 octaves down.

These options could have been put here for deadmau5 or at his request, so they are something to consider. The lowest note item is interesting as it is something that is a characteristic of the deadmau5 style, so it leads me to believe the inclusion in Cthulhu could be related to his method.

Looking at various deconstructions of deadmau5 songs, I am finding also that the  Aeolian (Natural Minor) modes are used in quite a few of them. A few have Dorian, Major, and even a Locrian.

  • All I Have – D-sharp, Minor, 128 bpm
  • Alone With You – G-sharp, Minor, 128 bpm
  • Arguru – E, Minor, 128 bpm
  • Avarita – D, Dorian, 127 bpm
  • Brazil – D-flat, Major, 128 bpm
  • Faxing Berlin – B-flat, Major, 128 bpm
  • Fn Pig – D, Minor, 88 bpm
  • Ghosts n Stuff – B-flat, Minor, 128 bpm
  • I remember – B, Minor, 128 bpm
  • Maths – G-sharp, Locrian, 128 bpm
  • October – G-sharp, Minor, 127 bpm
  • Professional Griefers – B-flat, Minor, 128 bpm
  • Raise Your Weapon – G-sharp, Minor 126 bpm
  • Right This Second – B-flat, Minor 96 bpm
  • Snowcone – E, Dorian, 98 bpm
  • Some Chords – G-sharp, Minor, 127 bpm
  • Strobe – G-sharp, Minor, 256 bpm
  • The Veldt – A, Major, 128 bpm
  • There Might Be Coffee – G, Minor, 127 bpm

Arpeggio Deconstruction

Next, I used Cthulhu’s arpeggiator to replicate the arps in the deadmau5 composition. This was a separate file from the above-pictured MIDI notes. I used the non-arpeggio MIDI file from the last section as the chord portion of each step. This way, I know the arp was based on the chords.

I tinkered with the Cthulhu arp section until I got something that was exactly what deadmau5 wrote. Cthulhu could produce the same arpeggio as the MIDI of the deadmau5 arpeggio.

This was possible by using two screens of the arpeggiator. First was the note selection screen where I have a 6,6,7,6,6,8 pattern. The arp sequence was six notes long and repeating. The first note was the 6th highest note of the chord. You can see this in the left picture as the bar with a 6 on it.

Next was also the sixth like the first, but two octaves lower as shown by the graph on the right where there are two bars filled down from center on the second column over. So basically it is the same note repeated but two octaves lower.

The third is the seventh highest note of the chord, followed again by the sixth highest but two octaves lower (again the graph on the right shows this in the fifth column from the left).

This repeats and if I hold the keyboard keys for the appropriate amount of time on each, I can replicate exactly the arpeggio.

Again in this situation, I believe deadmau5 makes it so it sounds right to him.

In a TwitchTV video from April 25th, 2016, deadmau5 has Cthulhu open and making a great sound using the settings shown in the picture below.

Here the pattern is 1,5,1,3,2,6. Again, like in the previous example, it is a 6 note arpeggio. I did not see his octave screen. He moved these around before and after this screenshot was taken. He was experimenting to get the sound right. He even had a pattern of 8 open at one point but then reduced it to 6.

Here below is the video it came from. Look around 1:25:06 and start watching from there.

Further Study

I tried yet another deadmau5 composition of chords and arpeggios. The pattern of this one was not there, but the repetition of the chord with the central parts variation was. So this could be a consistency. There was also an unchanging bassline to the chord progression that anchors the bass with a steady beat.

Different were the number of steps in the arp and the structure of it was completely different. So was the chord progression itself. There was no clear major to minor relationship either.


deadmau5 uses a variety of hardware and software. I am concentrating on the software side of things because these are easier for me to obtain and analyze.

On Equipboard, deadmau5 equipment and software are listed.

Xfer Records makes great products and it looks like deadmau5 uses their products extensively.


Items common to deadmau5 chords and arpeggios:

  1. The bassline of the chord progression is unchanging and the chord notes in it is an octave or lower while maintaining the key of the chord. This makes the bassline of the composition.
  2. The central parts of the chord progressions have different notes (also in the chord) to provide variation. But, the ends and beginnings of the chord progressions match and do not. This makes the chord progressions match and resolves well together.
  3. The arpeggios go up or down by octaves. I saw this in an analysis of another one as well.

The other items are different:

  1. Length of the arpeggios is different.
  2. Chord progressions are different and I cannot tell what pattern they follow.

That is all I have for now but will update this if I go further in studying it.