root + 3 + 7 + 10: the only house chord recipe you need

root + 3 + 7 + 10. four numbers. that's the whole voicing behind half the house and garage chords you've ever loved, and almost nobody tells you it's that simple. those aren't scale degrees and they're not random. they're semitones counted up from your root note. learn to count them on your fingers and you can build that warm, slightly sad, hands-in-the-air chord in any key without knowing a lick of theory. so let's break down what each number is and why this particular stack slaps.

what the numbers actually mean

every number is how many semitones (half-steps, one piano key at a time, black or white) you climb from the root. so if your root is A, you count up from A:

• root (0): the home note. play an A.
• +3: three keys up from A is C, the minor third. the minor third is the note that makes a chord sound moody and emotional instead of bright and happy. it's the single most important note in the whole stack.
• +7: seven keys up from A is E, the perfect fifth. it's the most stable, neutral note you can add. it doesn't change the mood, it just makes the chord feel solid and full.
• +10: ten keys up from A is G, the minor seventh. this is the secret ingredient. the b7 is what turns a basic, slightly thin chord into that lush, smoky, "ooh that's the one" house sound.

stack A, C, E, G together and you've built an Am7, an A minor seventh chord. that's it. root, minor third, fifth, minor seventh. the minor 7th chord is the bread and butter of deep house, soulful house, garage, the lot.

move it to any key without thinking

this is why semitones beat memorising chord shapes: the recipe never changes. whatever note you start on, the gaps stay 3, then 4, then 3. (from root to the third is 3 semitones; third to fifth is another 4; fifth to seventh is another 3.) so to move the chord, you just slide the whole shape up or down and keep the spacing identical.

1. pick a root. say you want a D minor 7. start on D.
2. count +3. three keys up from D is F. that's your minor third.
3. count +7 from the root. seven up from D is A. your fifth.
4. count +10 from the root. ten up from D is C. your minor seventh.
5. play D, F, A, C together. that's Dm7. same feeling, new key.

do that on a few different roots and you've got a progression. a classic, never-fails house loop is just four minor 7ths and a couple of major-flavoured ones, all built from the same counting trick. once your fingers know the 3–7–10 shape, you stop hunting for chords and start hearing them.

voice it so it doesn't turn to mud

the raw four-note stack is correct, but jammed into one tight cluster down low it sounds like a fog horn. what separates a bedroom demo from a record is voicing: how you spread those same four notes across the keyboard.

• drop the root an octave below the rest. let your bassline handle the low root and give the chord some air. one low note, then the third, fifth and seventh clustered higher up around middle C.
• don't double the root in the chord. if the bass is already hammering an A, you don't need another A up top. play the chord from the third instead. it's cleaner, and it leaves room for the low end.
• keep the upper notes tight, roughly within one octave around C4. spread them too wide and they smear together on a club system.
• add the 9th when you want it lush. the 9th is +14 semitones (two semitones above the octave). stacking that on top of your m7 is how you get that floaty, expensive deep-house sound. you don't always need it, but it's there when you do.

play the same Am7 as a tight low cluster, then as a spread voicing with the root down an octave, and you'll hear it instantly. same four numbers. completely different record.

make it a house chord, not just a chord

a perfectly voiced chord held flat is still dead on arrival. house grooves because the chords are short, swung and on the offbeat. so once you've built the voicing, play it as a stab. clip the note length to an 8th or 16th so it punches and gets out of the way of the kick. land it on the "and" of the beat, not on the downbeat with the kick, and add a touch of swing (somewhere around 8–12%) so it shuffles instead of marching. high-pass the chords around 200–300hz so they're not fighting your bass down low, and a short reverb plus a 1/8-note delay will wash the stabs out wide.

none of this needs an expensive plugin. it needs you to count to ten on your fingers and trust your ears. but if you'd rather skip the counting and start with chords that already sound like a record, that's the whole reason we built chordBox: 300 chords sampled off real vintage synths (Roland D50, Yamaha DX7, Jupiter, OB-X6, MicroKorg, System 8) run through a Neve 1073 and API 2500 chain, with the 7ths and 9ths already voiced and royalty-free. drop in an m7, chop it into offbeat stabs, done. either way, the recipe's the same: root + 3 + 7 + 10, and you've got a belter. (Belterbot's already counting on his fingers.)