Once treats audiobook production as something a child can hold: a story goes into the box, comes back as blocks, and the blocks become a world. The pauses in a recording are found by measuring loudness in small windows; wherever the level stays under the snipping threshold for a moment, the recording is parted into blocks. Snipping, trimming, reordering and stitching happen on views into the original audio — nothing is re-encoded, nothing is lost, and every block can be pulled longer again by its side pegs. Whatever the scissors take out waits in the snip bowl, from where a tap puts it back in its old place.
A story can follow a path. The old shapes children’s tales are built on — the hero’s journey, the three tries, there-and-back — become rows of labelled scene frames on the planks, each with one small job: an obstacle appears, the third try succeeds. Recording fills the next open frame; the path can be switched at any time and the blocks simply get new jobs. It is scaffolding, not a cage — free telling stands right beside the paths, just as tall.
Two quiet helpers listen along, and both are guesses that say so. The voice badge on a block comes from measuring how high the voice’s pitch sits — a rough sorting into younger, higher voices and deeper, grown ones, with a tap to correct it. And where the box knows a story’s words, it looks for things that make sounds — a door, a bell, water — and lays see-through sound ideas onto the blocks: nothing is added until a hand says yes.
Every sound sticker and every world stone behind a scene is a small synthesis recipe — filtered noise, slow modulation, soft chords, little impulses for raindrops and fire crackle — computed live while the story plays; the only recordings shipped with this page are the two narrators’ tales. While a voice block plays, an envelope follower on the voice channel presses the world’s loudness down and lets it back up in the gaps, the way a mixing engineer would ride a fader.
Sound lives on two layers, and the box keeps them apart. The ground bed is one low sound under the whole story — it fades in at the first word, holds through every scene, and fades out at the last; it has its own plank and its own volume knob. Moment sounds sit at exact spots: a sticker dragged onto a block plays at that very position, movable and removable. Ask for a sound plan and the box reads the story’s words and lays out both layers as suggestions — a bed that fits the place the story happens, an opening sound, moment ideas where a door or a dog turns up — each waiting for a yes. When a Claude companion is awake on this machine next to the page, a small badge lights to say so; the plan is read from the story’s own words either way.
The sticker shelf can also hold your own catches. The red catch-stone records up to eight seconds — a creaking door, a barking dog, a spoon on a pot — you give the catch a sticker face, and it is kept on this device so it is still on the shelf the next time the studio opens.
The two storytellers, Milo and Luna, are real narrations, embedded in this page. Their tales run through the very same pipeline as your own recordings: the same loudness measuring parts them into blocks, the same worlds duck under their voices, the same export stitches them. They exist so the studio can be tried without a microphone.
The treasure chest
The chest searches the BBC’s sound-effects archive (sound-effects.bbcrewind.co.uk) — tens of thousands of real recordings, offered under the BBC’s RemArc licence for personal and educational play, not for commercial use. The page ships none of those recordings; each sound is fetched from the archive only when you ask for it, and only your search words travel there. A sound you put in the box is kept on your device, trimmed to a small keepsake.
Passing stories on
A story can leave the box as one small file and continue in another Once: blocks, worlds, stickers, the ground bed, the knob settings and every caught or found sound the story uses travel along, and whoever receives it can listen, change everything, and add scenes of their own before passing it on again. Any empty scene can be saved for someone by name — for Grandma — and when she opens the file, the box greets her plainly with the scene that waits for her voice; she records it, and sent back, her scene settles into its right place.
Because of that, a whole story can be told in turns. The file carries a story-pass: whose turn is next, and a stamp for every teller who has already added a scene. Pass it on, tell your part, pass it back — the box keeps that order in the file and on this device, so a reload picks the round up where it stood. All of it happens with files you send yourselves; there is no account and no server.
A few things people wish for would each need a small shared server, and so are named as directions rather than built here: a live nudge on the next person’s device the instant it is their turn; a shelf of other families’ stories to browse; little favourites or awards a story could earn. None of those are mocked up on this page.
Privacy
Your recordings and your sound shelf stay on your device.