How to make a lo-fi beat

Lo-fi is one of the easiest sounds to recognise and one of the hardest to describe vaguely. The genre is built on a few specific choices: a slow tempo, jazzy chords, laid-back drums and a layer of warmth and noise. Name those and you are most of the way there, because lo-fi is more about a consistent set of production decisions than about any one melody.

That is good news for prompting. A genre this defined by texture and feel rewards concrete description, so a precise lo-fi prompt lands more reliably than a precise prompt in a genre with looser conventions.

The ingredients of a lo-fi beat

• Tempo: 60 to 90 BPM, with 70 to 75 the classic relaxed pocket. Slower feels sleepier, faster starts to feel like regular hip-hop.
• Chords: jazzy electric piano or Rhodes, often with seventh and ninth chords that give the harmony its wistful, unresolved colour.
• Drums: mellow boom-bap, sometimes brushed, sitting slightly behind the beat so the groove feels loose and unhurried.
• Bass: warm and round, usually a simple sub or an upright-bass feel, holding the harmony down without drawing attention.
• Texture: vinyl crackle, tape saturation and a gentle low-pass filter that rolls off the bright highs and makes it sound dusty.

Why those choices add up to lo-fi

Each ingredient does a specific job. The slow tempo and behind-the-beat drums create the relaxed, unhurried feel. The jazzy seventh and ninth chords supply the bittersweet, slightly nostalgic harmony that lo-fi is known for. The vinyl crackle and tape saturation are the signature: they take a clean digital recording and make it sound like a worn record, which is the whole aesthetic, comfort and imperfection rather than polish. Understanding the why means you can bend the recipe knowingly instead of guessing.

A prompt to start from

Lo-fi hip-hop, ~72 BPM, jazzy Rhodes chords with seventh extensions, mellow boom-bap drums, warm sub bass, vinyl crackle and tape saturation, nostalgic and relaxed, instrumental, good for studying.

Every word in that prompt is doing a job, and you can see the structure from the general prompt guide at work: genre, then tempo, then the defining instruments, then texture, then mood, then the instrumental flag. There is nothing decorative in it, which is why it lands.

Variations to try

• Drop to 65 BPM for a sleepier, late-night feel that suits winding down rather than studying.
• Add rain and distant city ambience for a rainy-day version, which leans into the cosy, indoors mood.
• Swap boom-bap for brushed jazz drums for a more organic, acoustic take.
• Add a muted trumpet or saxophone line for a late-night jazz-hop mood.
• Pull the filter back to brighten it slightly if it feels too muffled for what you need.

Change one thing at a time so you can hear what each edit does. If you swap the drums and add a trumpet and drop the tempo all at once and the result is better, you will not know which change earned it.

Common lo-fi mistakes

• Setting the tempo too fast, which tips it out of the relaxed pocket and into ordinary hip-hop.
• Using plain triads instead of seventh and ninth chords, which strips out the jazzy, bittersweet colour that defines the genre.
• Over-cleaning the sound. Lo-fi is supposed to be a little worn; remove all the crackle and saturation and it stops being lo-fi.
• Adding a busy, attention-grabbing lead. Lo-fi wants restraint; the elements should sit back, not show off.