Rakuno'Oto is a free online ambient sound mixer that lets you create your perfect soundscape by blending 9 different sound sources: rain, brown noise, white noise, streams, city sounds, campfire, ocean waves, instruments, and more. Ideal for focus work, studying, sleep, and relaxation. No app installation or account needed—simply open your browser and start creating your custom background noise. Mix ambient sounds to boost concentration, reduce stress, and create the ideal productivity soundscape.
Rain
Brown Noise
White Noise
Stream
City
Campfire
Ocean
Instruments
Extras
Master Volume
Fluctuation Depth
Spatial Audio
Screen Wake Lock
If sound is not playing on mobile, check that the mute switch on the side of your device is turned off.
♥Thank you received!
* Please enjoy at a moderate volume and take breaks.
How to: Inhale for 4 seconds → Hold for 7 seconds → Exhale for 8 seconds
Benefits: Holding your breath raises CO2 levels in your bloodstream, signaling your brain to relax. This technique is designed to support relaxation and promote a sense of calm.
Best for: • When you need deep relaxation or have trouble falling asleep • When stress is building tension in your head or shoulders
Note: If holding for 7 seconds feels difficult, the technique backfires. If so, try 4-4-8 breathing instead without strain.
2. "4-4-8 Breathing": Mild Reset
How to: Inhale for 4 seconds → Hold for 4 seconds → Exhale for 8 seconds
Benefits: Follows the principle of exhaling for twice as long as you inhale, but with a shorter hold. This makes it easier to establish a rhythm and maintain consistency.
Best for: • When you want to calm down during work without losing focus • When 4-7-8 breathing feels too intense
Tip: Focus on exhaling slowly and completely over 8 seconds rather than the hold time—that's where the calming magic happens.
Recommended Posture (Both)
Sit up straight with relaxed shoulders, or lie flat on your back. Breathe in through your nose and exhale slowly through your mouth. Before bed, practicing while lying down is ideal.
Note: If you have heart, respiratory, or blood pressure concerns, or if you're pregnant, consult your doctor first. Stop if you feel unwell.
About "Connect with Others"
This feature lets you gently connect with someone else using Rakuno'Oto right now.
Tap the button to sync with someone else's mix playing somewhere in the world. You're not in the same room, but for a moment, you're sharing the same soundscape—a subtle, meaningful connection.
Key Features
• No tracking of who connects with you
• No counting or recording "thanks"
• No notifications, history, or leaderboards
Designed to avoid social media competition and addiction cycles. A simple human connection without dopamine-driven engagement.
How to Use
1. Tap "Connect with Others"
2. Wait for a match (may take a moment)
3. Once connected, their mix automatically syncs
4. Send gratitude to share your appreciation