Guide

How to mix sleep sounds for a baby

One sound is fine. Two or three, balanced well, can be gentler than any single one — a warm noise bed with a heartbeat pulse and a little rain for movement. This guide shows how to build a mix in Baby Sleep Noise: Womb Sounds without making it busy or loud.

Sound mixer with a two-layer mix of pink noise and baby heartbeat, a master room level and per-layer sliders with mute and solo

Guide · Updated

Start with a bed, add a pulse, then texture

Think in three roles. The bed is a steady noise — pink or brown — at a moderate level; it does the masking. The pulse is a heartbeat or baby heartbeat at a low level; it gives the newborn weeks something familiar. The texture is rain, ocean or fan, quieter still; it adds movement so the sound is not a flat wall. Most good mixes stop there.

Because every layer is generated live, they never drift or loop against each other. Rain over a heartbeat at 3 a.m. sounds the same as it did at 8 p.m.

Mixes that show up in favorites

  • Womb Calm: pink hush with a soft baby heartbeat — the newborn standard
  • Rain over heartbeat with brown noise underneath
  • Fan under a lullaby for the bedtime routine, fan alone through the night
  • Ocean with pink noise for naps in a bright room

Keep the total level moderate

Adding layers adds loudness. When you add a second or third layer, bring the bed down a notch so the whole mix stays at the same moderate level you would use for one sound. The master output is hard-capped in the audio engine, but the target is a hush you could talk over from the crib, with the phone at least two metres away.

This guide is general information for parents, not medical advice. Every baby is different; if you have concerns about your baby’s sleep, hearing or health, talk to a pediatric professional.

Steps

Building and saving a mix takes a couple of minutes; after that it is one tap.

  1. Open the mixer

    Tap Mixer in the tab bar. Add a first layer — pink or brown noise — and set it to a moderate level.

  2. Add a pulse

    Add Heartbeat or Baby Heartbeat as a second layer at roughly half the level of the bed. Adjust the rate and warmth if you like.

  3. Add texture, quietly

    Add Rain, Ocean or Fan at a low level — enough to notice, not enough to lead. Bring the bed down a notch to keep the total level steady.

  4. Listen from the crib

    Stand where your baby will lie with the phone in its place two metres away. If you cannot comfortably talk over it, lower the master level.

  5. Save as a favorite

    Tap Save and name the mix. It appears on Home for one-tap starts, and the sleep log will record it by name.

  6. Set timer and fade

    Choose a sleep timer and a fade-out of 5 to 15 minutes so the mix tapers into silence rather than stopping.

Frequently asked questions

How many layers can I mix?

Two layers in the free plan; Premium unlocks four-layer mixing along with the full sound catalog.

Can the AI helper build a mix for me?

Yes. Describe what usually calms your baby and the AI sleep helper returns a playable mix and a simple routine to try. Treat it as a starting point — and not as medical advice.

Try it tonight.

Baby Sleep Noise: Womb Sounds is free to start on iPhone, with core sounds, a two-layer mixer and the sleep timer. No ads, ever.