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Music theory made simple

Music theory is only useful when it makes your songs hit harder and your playing feel easier, so let’s prove it.

100ready prompts
freeto start
~1 mineach
See them ↓All of it

What AI quietly does for you

100 of them — tap, copy, paste
Find chords hiding in songsAct like a friendly theory trainer. I’ll paste a song link or chord chart. Identify the…+
Act like a friendly theory trainer. I’ll paste a song link or chord chart. Identify the chord progression in simple terms, then explain why each chord works, using plain language. Here’s the song: [paste YouTube/Spotify link OR chord chart].
when the reply comes backCircle the one insight that changes how you’ll play or write over that progression.
Name that weird chordI’ll paste a chord shape or piano voicing I like but can’t name. Tell me what it’s called,…+
I’ll paste a chord shape or piano voicing I like but can’t name. Tell me what it’s called, what notes are in it, and three common ways it’s used in real songs. Here’s the voicing: [describe fingering or notes].
when the reply comes backDecide where you’ll actually use this chord in a song you’re working on.
Turn feelings into chord typesTreat me like a songwriter who thinks in feelings, not numbers. For each mood I list, give…+
Treat me like a songwriter who thinks in feelings, not numbers. For each mood I list, give me 3–5 chord types or progressions that match, with one famous song example. My moods: [list moods like ‘bittersweet hope’, ‘late-night anxiety’, ‘nostalgia’].
when the reply comes backPick one mood and immediately sketch a verse or loop with the suggested chords.
Translate melody to scaleI’ll paste or describe a simple melody I wrote. Guess the most likely key/scale, name the…+
I’ll paste or describe a simple melody I wrote. Guess the most likely key/scale, name the notes, and suggest three compatible scales or modes I can try over it for different colors. Melody: [type relative note steps, solfege, or absolute notes].
when the reply comes backTry the ‘weirdest’ suggested scale and record a 30-second improv over your melody.
Map my favorite keyHelp me fully understand one key I actually use. I’ll say the key. You give me: scale…+
Help me fully understand one key I actually use. I’ll say the key. You give me: scale degrees, diatonic triads and 7th chords, 3 common progressions, and what notes feel ‘home’ vs ‘tension’. My key: [key name].
when the reply comes backWrite one short progression using only diatonic chords, then swap one chord for a non-diatonic surprise.
Cheat sheet for Nashville numbersTeach me the Nashville Number System only using one key I already know. Show the scale,…+
Teach me the Nashville Number System only using one key I already know. Show the scale, label each degree with numbers and ‘feel words’, and give 5 example progressions in both chord names and numbers in that key. My key: [key].
when the reply comes backRewrite one of your own songs as numbers and see if a key change suddenly feels easy.
Deconstruct a hook I loveI’ll paste a link to a song with a hook I’m obsessed with. Break down the theory of that…+
I’ll paste a link to a song with a hook I’m obsessed with. Break down the theory of that hook: key, scale degrees, main rhythm, and why it’s so catchy, using plain English and zero jargon. Song: [link].
when the reply comes backBorrow just one trick from that hook and twist it into your own 4-bar idea.
Write progressions by feeling wordsI’ll list some feeling words and a target genre. Suggest 3 chord progressions for each…+
I’ll list some feeling words and a target genre. Suggest 3 chord progressions for each feeling, in that style, with at least one ‘safe’ and one ‘spicy’ option. Feelings: [list]. Genre: [genre].
when the reply comes backHum a topline over the ‘spicy’ option without touching your instrument first.

Real questions

honest answers

No, you don’t need it to start or even to finish songs, but it can save you years of blind experimenting. Theory is just language and pattern recognition: it names things your ear already half-understands. If you’re banging into the same walls—same four chords, same rhythms, same melodies—then a bit of theory gives you new doors to open. Use it like a toolbox, not a rulebook: pick up the tool that solves today’s problem, then go back to listening.

Tie every bit of theory to a song, riff, or beat you actually care about. Don’t learn “the major scale”; learn “the scale from that hook I love” and play along. Keep sessions short and practical: 10–20 minutes where you hear, sing, or play something new, then immediately use it in your own idea. If a concept doesn’t change what you play, shelve it for later. The moment theory feels like school, drag it back into a track, a jam, or a cover.

Start with what hits your ears every day: rhythm counting you can feel, major/minor scales, basic chords in a few keys, and how your favorite songs move between them. That’s 80% of the benefit. Safely ignore deep Roman-numeral analysis, advanced counterpoint, and exotic scales until your own music starts demanding them. When you get stuck—can’t find a new chord, your melodies all blur, your grooves feel stiff—that’s your cue to learn the smallest bit of theory that unblocks that exact problem.