Torvian

Torvian teaches you to identify birds the way a field recordist does: by looking at the shape of a voice. Every song in Torvian is drawn as a sonogram — pitch climbing the page, time ⏱️ running left to right — inked as an engraved trace on a hand-tinted naturalist's plate. A clear whistle is a thin line. A buzz is a solid smear. A trill is a row of even teeth. Once you can see 👀 the difference, you can hear it. THE SONOGRAPH The workbench 🛠️ at the centre of the app 📱. A call inks itself across the plate as you listen, looping while you work. Scrub the timeline 🕒, pinch to zoom into the span, then drag ✋ a box around the one diagnostic syllable that names the caller. Candidate species ignite and dim in the vermilion margin as your framing tightens. Replay just the boxed phrase to check ✅ your ear against your eye. Frame the separating phrase correctly and the identification files a plate card — portrait beside its sonogram — into your Life List 📋. Frame the wrong ❌ syllable and the call ends unclaimed, and the plate is left blank. THE VOICE PLATES Fifty species, each with its scientific name, family, habitat notes 📝, a written breakdown 🧾 of its song structure, and a live sonogram drawn from that species' own contour. Ten are anchored by bespoke chromolithographic portrait plates. Every entry cross-references the species it is genuinely confused with — Wood Thrush against Veery and Hermit Thrush, Chipping Sparrow against Dark-eyed Junco — and any plate can be loaded straight into the Sonograph to be read. THE LISTENING ROOM Fifteen order-gated lessons that build 🔨 from "pitch up, time ⏱️ across" through upslurs and downslurs, the clear whistle, the buzz, the trill, modulation rate, the clean 🧼 sweep, and the two-part phrase, up to the hard confusion pairs. Each lesson 📖 ends with a knowledge check ✅ on a real per-species sonogram: read the contour, name the caller. THE LIFE LIST 📋 Your vault. Filed plate cards keep the boxed diagnostic phrase you framed. Add a field note 📝, attach a photo 📸 of the bird or its habitat with the camera 📷, and export 📤 a branded plate card — cream paper, sepia frame, the real sonogram, caption and seal — to your photo 📸 library 📚 or share 🤝 it. THE FIELD MARKS Forty terms of auditory and spectrogram vocabulary, twenty of them with a worked mini-sonogram, cross-references, and the species that demonstrates them. THREE PLATE THEMES Rag Plate, a cream hand-tinted field-guide plate. Nocturne Field, bone ink on deep botanical dark for the pre-dawn chorus. Foxing Vellum, a century-old, sun-tanned plate. Each retints the whole app 📱, sonograms included. WORKS ENTIRELY OFFLINE 📴 No account, no sign-in, no ads, no purchases, no tracking. Every species, lesson 📖 and glossary entry ships inside the app 📱, and your Life List 📋, progress 📈 and preferences stay on your device 📱. Torvian's call audio 🔊 is synthesised live from each species' own contour data, so the sound you hear and the trace you read come from one source and always agree. It is a reading instrument for learning song structure, not a recording archive and not an automatic song-recognition tool 🛠️.