A more natural way to listen.

Games uses recorded instruments, a recording of children cheering, and optional natural read-aloud. There are no paid speech API calls or per-play AI token charges.

Instrument recordings

The upright piano, glockenspiel bells, and wooden xylophone are acoustic recordings from VS Chamber Orchestra: Community Edition, recorded by Sam Gossner and Simon Dalzell, with sample cutting by Elan Hickler / Soundemote. The library is released under CC0 1.0.

We trimmed silence and long tails, balanced levels, added gentle fades, and converted the recordings to stereo 16-bit WAV files. The game changes playback pitch to provide the notes on its keyboard. The instruments retain their own ranges: the xylophone sounds higher than the piano, and the bells higher again.

Music Studio recordings

Piano and bells use the VSCO 2 recordings above. Flute and trumpet also use VSCO 2 Community Edition by Sam Gossner and Simon Dalzell, under CC0. The electric keyboard uses recordings of a Yamaha TX81Z FM piano; the bass drum, snare, hi-hat, tom, and cymbal use acoustic percussion recordings from the Versilian Community Sample Library by Versilian Studios LLC, also under CC0 1.0.

The acoustic guitar recordings are from the tonejs-instruments sample library, edited by Nicholas Brosowsky, with original recordings credited to the University of Iowa Musical Instrument Samples. These edited samples are licensed under Creative Commons Attribution 3.0 Unported. Source and license notice.

We trimmed silence and long tails, balanced playback levels, added short fades, and converted samples to 44.1 kHz 16-bit WAV. Nearby recorded pitches supply the other notes. Bells sound one octave above the piano. Piano, guitar, bells, keyboard, and drums decay naturally; flute and trumpet can sound for up to about six seconds per held note. All recordings are served by this website. Recording a tune stores note events temporarily in the tab, without a microphone, uploads, or AI requests.

Children’s celebration

The win sound combines Child saying awesome by boldcity, identified by its creator as an American-English little girl, with G29-61-Children Cheering by craigsmith, a recording of children shouting “Yay!” from Hollywood sound archives preserved by USC Cinema. Both source recordings are released under CC0 1.0.

We used the public high-quality previews, trimmed the clips, filtered low rumble and high hiss, balanced the voices, and added gentle fades. The crowd stays quieter under “Awesome!” so the word is clear. This 3.25-second mix keeps the original pitch and speed of both recordings. These are recorded voices.

The recording is hosted with this website and plays once when a challenge is completed, only with Sound on and volume above zero. Use Preview win cheer in Parent settings to hear it. Pause, Stop sound, mute, and moving to another challenge stop playback. It uses no AI service or per-play tokens.

Road-trip sounds

The sporty engine comes from Mustang Ehxaust.aif by victormalloy. We made a short crossfaded loop from the public high-quality preview, balanced its volume, and converted it to mono 16-bit WAV. The game changes playback rate and gain as the player speeds up or slows down. This is an independent game, not a vehicle-brand endorsement.

The short, playful horn uses Bicycle Horn by AntumDeluge, a recording of a child’s plastic bicycle horn. The dog’s greeting uses Puppy Bark by AntumDeluge, adapted from moffet’s recorded dog bark to sound like a small dog. We reduced its playback level, trimmed silence, and added gentle fades without further changing its pitch or speed.

Friendly hellos and birdsong

The girl’s greeting is Hello Baby Girl by Mike Koenig, a recording the author identifies as his little daughter saying hello. It is used under Creative Commons Attribution 3.0 Unported. We trimmed silence, balanced the level, added gentle fades, and converted it to mono 16-bit WAV. The voice’s pitch and speed are unchanged. The softer option uses the same recording at lower volume.

The birds use a 3.2-second stereo excerpt of Birds Chirping.wav by Lizardhood. Levels are balanced and the ends gently faded, with the source pitch and speed preserved.

The engine, horn, dog, and bird recordings are released under CC0 1.0. All processed recordings are hosted with this website. The girl, dog, and birds greet the car from the sidewalks as it passes; you can also tap their pictures. Automatic greetings are spaced apart and do not overlap. Sound on/off, volume, Pause, Stop sound, and the separate road-trip sound switches control playback. There are no paid audio API calls or per-play token fees. Full recording provenance, including retired clips.

Read-aloud voices

The warm and bright options are synthetic voices produced locally using Kokoro (Heart and Bella). They are not recordings of a live narrator. Their voice volume and treble are softened, with short pauses between reading segments. Preview the voice and choose a comfortable pace. Text stays on your device. The initial voice download is about 110 MB; browser caching may avoid downloading the model again. No microphone is used.

Parents can also choose an English voice already available on their device. These voices vary by browser and operating system. The games exclude remote device voices and never silently switch to a paid service.

Discovery Lab bubbles

The beakers use a real water recording: Bubbling water by AudioPapkin, released under CC0 1.0. This four-second stereo excerpt has balanced volume and gentle fades, with the original pitch and speed preserved. It is hosted with the website and plays only when Sound is on and a beaker is selected. There are no paid audio API calls or per-play token fees. The scientist, glassware, microscope, and simplified slide illustrations are original website artwork.