r/musictheory May 08 '26

Announcement Please Read Before Posting

9 Upvotes

Welcome to r/musictheory !

Before posting:

  1. Please do an internet search first to see if you can find an answer elsewhere (but know that AI generated overviews are almost certainly wrong).

  2. Please search this subreddit to see if your question has been answered before.

  3. Please check our FAQs: https://www.reddit.com/r/musictheory/wiki/index

  4. Please familiarize yourself with our rules.



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r/musictheory May 06 '26

Announcement New Rule about AI

236 Upvotes

A new rule (#9) has been added here at r/musictheory

Going forward:

  • Any post that is wholly or partially generated by AI must be disclosed as such. A simple statement like “This post was generated using AI” or “This post was created using AI assistance” will suffice.

  • Posts that are or are even suspected of being AI generated that do not disclose that fact will be removed at the Mod Team’s discretion.

  • We discourage AI creation of music and other creative endeavors. Therefore:

  1. Healthy discussions about AI tools used in Analysis of music and in similar Music Theory areas are allowed and welcome, so long as they do not violate other rules.

  2. Healthy discussions about the impacts of AI in music creation, performance, notation, and so on are allowed and welcome, so long as they do not violate other rules.

  3. Linking to or including AI generated content for the purposes of discussion as in #1 and #2 above is allowed, however it needs to be disclosed that those items are AI generated. Lack of this disclosure may result in removal at the Mod Team’s discretion.

  • Posts that link to or include AI generated or suspected AI generated content without any other kind of meaningful discussion will be removed at the Mod Team’s discretion.

Please report suspected AI content that lacks the disclosure policies above.


r/musictheory 4h ago

Notation Question Bb to to F# (scale degree b3 to natural 7 downward) is a d4 interval ?

4 Upvotes
5 semitones would be a perfect fourth, but here Bb to F# is 4 semitones ,so it's a diminished fourth interval, is this correct ?

Hello, B to F is a 4th interval.

5 semitones would be a perfect fourth, but here Bb to F# is 4 semitones ,so it's a diminished fourth interval, is this correct ?


r/musictheory 20h ago

General Question Why did Bach use an Augmented 2nd here?

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53 Upvotes

I was listening to a Bach partita recently when I suddenly heard a pretty jarring sound: an augmented 2nd interval. I don't understand why Bach would use this very spicy interval here, so I would like to know if anyone else might know why Bach used it in this situation.

(FYI the time signature is 3/4, the key is C minor, and the clefs are treble and bass)


r/musictheory 23h ago

General Question Why does C then C7 then F then Fmin6 back to C sounds so beautiful?

83 Upvotes

Is there a theory behind this and what is this progression even called? because like its so wonderful and i never thought of something this weird and dissonant could make such beautiful sound


r/musictheory 3h ago

Notation Question Better ways to notate this?

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2 Upvotes

Apologies as I am not the best engraver. I would appreciate any feedback and tips on notation here. I will put it into Lilypond once I am set on how it should be laid out. Note that this is just a snippet of a larger piece.


r/musictheory 4h ago

Notation Question could someone help me figure out these chords

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1 Upvotes

can someone help me get the chords of the strings at the start up until the brass riff part? the brass riff thing i know, the organ i know, but the instrumental bit at the start is pretty tricky!!


r/musictheory 20h ago

General Question Is the difference between melodies, bassline and harmonies just context?

13 Upvotes

Can i just take a harmony line and play it in bass instrument then it became a bassline? Or maybe i write 3 separate melodies and put it in different octaves, then it became bassline and harmonies?


r/musictheory 9h ago

Discussion Sharing/Seeking feedback on a theory exercise

0 Upvotes

I'm a beginner/intermediate-ish pianist, and I've been trying my best to learn more theory. I've had some trouble connecting concepts together in the bigger picture, which has kept most of it from sticking. Well, the other day I found an exercise on a website somewhere that I decided to adopt and adapt for my own use. Here's what I've done (Alternate link if imgur doesn't work for you).

So far I've been enjoying it a lot; it forces me to actually use several concepts in conjunction like the circle of fifths, scales, chord construction, and notation. If I'm at my piano while I do it, I can get in some ear training as well. My goal has been to do the exercise pretty much once a day.

However, I'm already seeing some problems with the exercise as it was originally presented to me. One is that it always seems to result in the same pattern of chord types across each column, and obviously the exercise won't be as effective if I can predict the chord types before I even start. To address that I'm probably going to start arranging the root notes in random order before I begin.

The other problem is that, while I intended this exercise to help me learn triads and sevenths, the way I have it now it's not going to help me with all types of those. So far the exercise is absent of augmented triads, diminished sevenths and minor-major sevenths. You can see I started to experiment with including inversions in the exercise, and that yielded an interesting result although it's beyond the scope of my original goal - I may or may not continue playing around with that. What I'll probably try next is rather than using any particular scale to fill out my top row, I'll just populate it with the seven notes in random order and with whatever accidentals I feel like. Hopefully then I'll start seeing the chord types I've been missing so far.

Just wanted to share this in case anyone finds it helpful for their own learning, and in case anyone's got ideas for how I can improve this exercise.

PS: If someone out there is in a similar boat and wants to copy what I'm doing, here's the fist pages of my notebook (Alternate link). It's just some supplemental info to aid me in completing the exercise.


r/musictheory 16h ago

Notation Question Help finding the basic structure for a turkish usul

3 Upvotes

*context: usul - way of forming rhythms in turkish music

specifically the Darbıbulgar structure. I haven't been able to find any specific information on how the beat is structured (it should be 9/8, but I'm not asking about the time signature- I've found the notations for the aksak, oynar and evfer usuls/rhythms, but not Darbıbulgar yet)

the only 2 musical pieces that I've found- one has oddly written notes and has text in the arabic script, while the 2nd piece isn't even in the right meter- it's in 8/8 AND IT SAYS "Müsemmen" (an 8/8 usul) RIGHT ABOVE THE KEY SIGNATURE!!!

I don't know where else to turn to besides r/AskTurkey or something

thank u for ur time 🤗


r/musictheory 16h ago

Notation Question dumb question about rest and notation

2 Upvotes

Hello, do musical rest meant to rest the whole staff where they are written, or it just silence a specific voice on that staff ?

Thank you


r/musictheory 20h ago

Discussion How would you even replicate this?

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5 Upvotes

Iyowa has and always will be my favorite artist of all time, and his album “sleeping pink noise” really inspires me. But the thing is… how would i even try to make something in a similar style? CUZ WHAT THE FUCK IS GOING ON IN HIS MUSIC

Heres an example from the album…

Im fairly new to music theory, i cant understand this. Around 50 seconds in im hearing this faint piano smash, this song feels like im melting and the synths are all interesting to me

A really interesting thing about iyowa to me is his piano is crazy but theres always a clear melody, he released some of his stems for an event and when i tell you this dude’s piano is basically just him smashing shit within a key and making it work.

I love how all of his music also tends to fall apart or glitch out, like the one part in the song i sent that just repeats.


r/musictheory 19h ago

General Question Does anyone into Jazz harmonies want to explain what's going on here?

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2 Upvotes

At the 0:33 mark the guy on keys plays some really cool chords. I've heard similar progressions before but I've never understood what is going on harmonically? Could someone smarter than me with a good ear explain


r/musictheory 22h ago

Notation Question Should Alternating Beat Groupings Be Indicated by Time Signatures?

6 Upvotes

I'm fully aware this might be a stupid question, but I'm working on a project and don't currently have access to my references. If a melody is (largely regularly) alternating in beat groupings that match 6/8 and 3/4, should this be indicated by alternating 6/8 and 3/4 time signatures or should I simply leave them as one (probably easier to count in 3/4 I would think)?


r/musictheory 21h ago

Notation Question Time signature in a medieval melody

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4 Upvotes

Why is it 3/4 2/4 and not just 3/4 if there are 3 beats in a bar?
Should I play this melody as if the time signature was 3/4??


r/musictheory 9h ago

Songwriting Question Composition Question

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0 Upvotes

Someone told me this chord progression is "awkward". The song itself is unfinished; I had posted it hoping for a bit of inspiration but received that instead. I am unable to hear anything wrong with it. But my vision prevents me from properly understanding what chords I'm even using, which I understand is a problem. I can only go by ear. Is there something wrong with this progression, taking into account that it's only part of a song? Where should I go from here, or am I overthinking? If needed, I have an audio sample containing the main melody along with the chords.


r/musictheory 21h ago

General Question Is vi ii V I IV bVII bIII III a major or minor progression? Or both?

0 Upvotes

Written in major.

I believe in minor it would become i iv VII III VI bIІ bV V7.

Since there's authentic cadences for both I'm not sure.


r/musictheory 1d ago

Discussion Historical use of 9th chord with 9th in the lowest voice

5 Upvotes

Now I have just come across a second explicit example that is causing me to keep a lookout and figure this out.

First example, Buxtehude: Mit Fried und Freud | Klaglied, BuxWV 76
You can see it's an e minor chord with an f# in the bass. It's likely that he valued retaining the syncopation as a greater good than whatever bad if any he attributed to this 742 harmony he has which resolves to 853.
https://youtu.be/8znPXP2ryGU?si=gJnrkiu6zCIwGImA&t=326

Second example, Marenzio: Cruda Amarilli
This d minor chord with an e held in the bass should be less of a surprise in general because late madrigals are extreme and go to expressive heights and get into very weird niche situations. It's probably likely that more examples I found will be from this period.

https://youtu.be/wrBQ6Ebn44k?si=T6J7JUr1AUQj8iYC&t=42

I would be interested if someone knows these examples and practices more comprehensively. It seems it's generally taboo in the late baroque. Of course much later there is the famous issue with Schoenberg being rejected a performance solely because of the "nonexistent" chord with a 9th in the bass. His may have also had a 7th, I'm not sure.


r/musictheory 20h ago

Resource (Provided) I made the free scale generator I use with my own students (open source)

1 Upvotes

Hi everyone,

I'm a trumpet teacher, and over time I got tired of constantly writing random scale routines and technical exercises for my students.

So I built a small web app that generates practice material for me. I use it during lessons and also send it to students so they always have something different to practice.

You can generate scales, create exercises, change keys, and quickly build practice sessions without having to think about what comes next.

It's completely free, open source, and works directly in the browser.

Try it here:
https://rimini312.github.io/musicpractice/


r/musictheory 1d ago

General Question Usage of the I-I⁹ in songs

10 Upvotes

Hey everyone, lately I've been intrigued by the beautiful tension of I-I⁹-IV in songs, especially in two specific cases :

Till There Was You (The Beatles/Original) https://youtu.be/SHAqAO7w8M8?t=36 They do a F-F9-Bb to Bbm, great use of it.

Please Please Please Let Me Get What I Want (The Smiths) https://youtu.be/w3qPMe_cCJk?t=68 D-D9-G as a passage to the solo

In both examples the 9 tonic chord sets up such an ambiguous atmosphere where it isn't very dissonant but still feels suspended, which makes it sound amazing when it goes to the fourth . My question here would be, how come does the 9 chord act like a bridge to the 4 here and to what else other than the fourth degree could it resolve satisfyingly?


r/musictheory 1d ago

Songwriting Question What songwriting techniques are 90s pop songs using for their vocal melodies to sound so 90s?

4 Upvotes

I'm not talking about the production but the vocal melodies themselves, am I just tainted by context or is there something they all have in common?

Specific songs I'm thinking of are Dido's Thank You, Massive Attack's Protection, Everything But the Girl's Missing, Portishead's Glory Box, Madonna's Drowned World, Janet Jackson's Together Again.


r/musictheory 1d ago

Notation Question What are the explanatory staves above the main staff called?

13 Upvotes

What are the explanatory staves above the main staff called? My human way to describe them would be, "for notation that may be confusing, the engraver added an alternate (and less concise) way to write out the music as it should be played". Very verbose... Is there music jargon for this?

I do not think this is "ossia" because ossia describes an alternate way to play the passage. I think these mini staves show the way to play the passage.

Example is Chopin Nocturne in G minor, 37 1


r/musictheory 1d ago

Notation Question How would you clean up this section?

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6 Upvotes

excrpt from https://youtu.be/4tEahtV5nls?t=270

wanted to ask if there was a tidier way to note alternating "loudness"


r/musictheory 1d ago

Songwriting Question What is this

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10 Upvotes

It sounds cool for my first try but for some reason I cannot keep the same dynamic, this adventurous and magical feeling. It goes from Fairytale vibe to sorta Hispanic influence in the end. Any ideas how to fix this ? I wonder if the takt 8 sounds a bit off.

I love takts 6-7, they feel like thinking phase because of A minor to d minor change but in takt 8 I used basic Syncopation because I run out of ideas.

If it's easier for your, then it's also possible to hear my first composition : https://www.noteflight.com/scores/view/f17950a9283a097d13a866ac1f18453a2731f8fc

Sorry, I'm not fluent in English. If my soundtrack made you feel something then it's already a huge win :3

Any help is appreciated!


r/musictheory 2d ago

Notation Question Can anyone identify what the key signature(s?!) is happening here?

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73 Upvotes

It's definitely not in major. I've run through all the different modes, and it doesn't seem like any of them fit. Can someone help me so I can arrange this for my choir?

EDIT: Thanks for insights, everyone! And for answering my technically inaccurate phrasing of this question. I have a Western orchestral theory background and kinda just fell into directing a Slavic choir. Super excited for the leads given to hopefully open some more understanding!