The Most Soothing Music in the World

Unmute (bottom-left) to hear samples from the first track ... Rockabye Baby


About Us

Legato Waveforming™ Ultra-Soothing Music
Baby Eve was born on the eve of Christmas Eve, a sweet, beautiful early Christmas gift. She was perfect to us, but she had TEF, a condition that meant her throat was not connected to her stomach. The prayers of many were answered with her surgery and eventual recovery.

An important part of Eve's long journey to good heath was the consistent need for deep, restful sleep. We quickly realized that our immense lullaby-CD collection was not helpful. After a lot of hard work we developed Legato Waveforming™ ... the painstaking method of digitally smoothing every individual note into a smoothly emergent tone, be it from a violin, hammered instrument or plucked instrument. It helped baby Eve fall asleep despite and intrinsic throat hypersensitivity, and the whole house (our other kids) were soon also much calmer at nap time.


  1. Legato Waveforming, a proprietary process that makes music more gentle than is otherwise possible.
  2. Progressive Lulling, each successive song more lulling that the one before.
  3. Amplitude Equalization designed to play at very low volume, with respect to Fletcher-Munson curves.
  4. Periodic Tempo to lull and make it easy to hum along, and invaluable technique for inducing sleep.
  5. Ideal Tempo Range coincident with the restful range of an adult human's heartbeat.
  6. Full frequency response at low volumes for ideal neurological development.
  7. Associative Selections nearly everyone associates with feelings of peace and relaxation.


Full Digital versions available at iTunes, Spotify, GooglePlay, & Amazon (above 4 icons)

Below are selected portions from each songs. Each sample is about half of the length of the original.


We play it at night and it puts our kids right to sleep, and we play it for them in the morning and it starts the day our for them right, putting them in a peaceful friendly mood.

Karl Chandler

Father of Four, Vanderberg, CO
I loved how soothing this CD is. Even my 10 and 7 year old boys were lulled to sleep listening to it. It makes you want to lie down, close your eyes, and listen.

Kristen French

Mother of two, Meridian ID
The soothing effect it has on high-strung children is nothing short of amazing. I just put it on repeat and any existing ADHD type behavior simply disappears.

Sue Ellen Moser

MT (Music Therapist), Elkton MD
Science aside, I just love the music. It's just so beautiful and has an ethereal quality to it. That, and it just plain works. Period.

Linda Hart

Mother of five
It makes great background music for a noisy family. It brings down the stress level and is very calming.

Robin Smith

Mother of 4, Singapore
It's lovely. Very soothing. Very pretty.

Sally Peel

Mother of three, Manhattan Beach CA
Peaceful, relaxing, dreamy. I don't know who likes this music more... my baby or me!

Amy Olsen

Mother of 5
The warning on the back of the CD is appropriate: THIS PRODUCT HAS BEEN KNOWN TO CAUSE DEEP DROWSINESS. :)

Emily Plicka

Educator, Laie HI


Contact us

Technology FAQ


A. No, it isn't synthesizers, but it does involve live instruments combined with high-end sample play back equipment. Synthesizers aren't adequate because they create sounds electronically - usually resulting in sounds that indeed seem "electronic" to the listener.

Sample playback equipment on the other hand contain actual recordings of real instruments. Sleepwave's music uses both sample playback equipment and live instruments because there are many sounds that simply cannot be mimicked very well on even the best sample playback equipment.


A. The process is much more labor intensive than simply layering random improvisation. In order to produce music that is as true to the color and character as the produced by live instruments nearly every note needs "tweaking" of various envelope parameters. A trained musician should easily be able to distinguish between a recording of live instruments and a recording of sampled instruments. Since Legato Waveforming requires the use of sampled instruments painstaking effort was made to make it so realistic to even fool the trained musician where possible. Indeed, it would be easier to produce this music with a full piece orchestra to achieve the same results - except that live instruments simply are physically incapable of producing music as soothing as is possible with Legato Waveforming.


A. Waveforms in the frequency domain are responsible for the color and character of a sound, and can only be appreciated with the human ear. When we do Legato Waveforming we leave this waveform of the instrument as pristine and original as possible, but what we do modify are some of the "envelope parameters" of each note that each instrument makes.

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More precisely, every instrument produces a volume-vs-time curve that looks like a wave - and that's what we modify. We can modify this wave-shaped curve so that it starts out soft and gets louder, or starts abruptly instead of gradually. Legato Waveforming is the process of modifying each note so the attack is very soft, and then we stretch out the waveform so it blends in smoothly to the next note. "Legato" comes from Latin meaning softly flowing, and "Waveforming" is the modifying the envelope parameters that give shape to the wave-like volume curve.

This allows us to take a plucked guitar sound, and make it sound bowed - as if it were played with a bow like a violin has. We can also take a flute going up or down a scale and blur the edges of each note into the next. Both of these examples (bowed guitar, or a blurred flute) cannot be done with live instruments, but both processes do result in more soothing music than is otherwise possible.

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A. One technique is how we manually smooth out all the peaks and valleys of our recordings (Amplitude Equalization). Amplitude equalization is normally done automatically with what are called "sound compressors" or "limiters" - our experiences have convinced us that those methods are destructive to the quality of the music, so we do it manually. Serious classical music listeners, on the other hand, want "dynamics" (lots of variety between loud and soft sections of a piece of music). We however are producing soothing music to lull people to sleep or at least make them very restful.

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Another technique is that we try to keep a fairly periodic tempo (consistent tempo) throughout the music. This again, is more conducive to inducing a sleep enhancing environment, than if the tempo were more expressive. The intent of our music is to lull, not to impress with expression or dynamics (although we have yet to hear feedback that indicated the music was anything less than beautiful). A periodic tempo also makes it easier for the listener to hum along with the music - a technique that is invaluable for helping getting infants to sleep.

Another thing we do is produce music where our tempo range is within the restful range of the human heartbeat. Infants especially are conditioned to the rhythmic sounds of a mother's heartbeat. Adults also relax more when the beat is in the range from 40 to 60 beats per minute. Our music tends to be closer to 40 than to 60 to encourage deep sleep.

Yet another thing that is unique to SleepWave music is that it is engineered to play at low volumes. At low volumes the human ear is less sensitive to the very high and low frequencies as it is to the mid range frequencies. Most receivers now have a "Loudness" button for implementing a "loudness contour" that is supposed to remedy this situation (don't worry, 99% of stereo owners didn't know what that button was for either). Sadly, on most receivers the loudness contour is poorly implemented (usually they do nothing for the high frequencies, and the curve for the low frequencies is usually quite inaccurate). Therefore the loudness contour (based on Fletcher-Munson curves) was embedded in this music. You may still use your loudness button, though since depending on your amp it may not make enough difference to tell a difference at low volumes.

Lastly, our technique of Progressive Lulling is similar to efforts by others, but with a key difference. Rather than only paying attention to the tempo - we considered complexity of the song, polyphony, diatonic nature of the song, instruments, and lab testing.

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