Kontho (কণ্ঠ) — AI Voice Studio

Apnar kotha, je kono kontho-e, je kono bhashay. WhatsApp voice message er jonno.

Ki ki kore

1. Meye ↔ Chele kontho (female→male, male→female), plus Baccha, Boyosko, Robot, Cartoon.
2. Onno bhashay — Bangla, Hindi, English, Urdu, Arabic, Tamil, Telugu, Marathi, Gujarati, Nepali, Spanish, French, German, Russian, Chinese, Japanese.
3. Tone — Swabhabik, Khushi, Shanto, Dukkhi, Uttejito, Ragi.
4. Native pronunciation — Microsoft neural voice (prottek bhashar nijer male + female voice).
5. Instant — kontho bodol phone-ei hoy, 1 minute audio ~1-3 second.
6. WhatsApp — "WhatsApp-e pathan" button e share sheet khole, MP3 file jay.
7. Khoroch ₹0 — sob free/open-source.

Kivabe kaj kore (architecture)

Kaj	Ki use hoy	Khoroch
Kontho bodol (male/female/child/robot)	Nijer lekha TD-PSOLA engine (pitch + formant shift), phone-er browser-e	₹0, internet lage na
Bola kotha → lekha	Browser Speech Recognition (Chrome), na hole Whisper (server)	₹0
Onubad	Google Translate free endpoint	₹0
Sundor AI kontho + onno bhasha	edge-tts (Microsoft neural voices) on free Vercel function (api/)	₹0
App hosting	Vercel / GitHub Pages (PWA, phone-e install kora jay)	₹0

Folder

• app/ — puro app (index.html, sw.js, manifest). Jekono free static host-e rakhun.
• server/ — free voice server (Hugging Face Space, Docker).
• src/ — source (dsp.js = voice engine, body.html = UI). node build.js diye app banay.

Sobcheye sohoj: Vercel e free deploy (AI voice soho)

1. https://vercel.com/signup → "Continue with GitHub".
2. "Import" → KANTHO repo → "Deploy".
3. Je link pabe (jemon https://kantho.vercel.app) seta-i full app. AI voice server (/api) eki sathe chole.

Alternative: Hugging Face server (5 minute)

1. https://huggingface.co e free account khulun.
2. New Space → naam kontho → SDK: Docker → Blank → Public → Create.
3. server/ folder er 4 ta file (app.py, requirements.txt, Dockerfile, README.md) upload korun (Files → Add file → Upload).
4. 3-5 minute build hobe. Tarpor link hobe https://<apnar-naam>-kontho.hf.space.
5. App e ⚙ Settings → oi link din → "Server test" ✅.

Note: free Space 48 ghonta kono use na hole ghumiye pore; prothom request e ~30 second lagte pare.

Porer dhap (quality upgrade)

• RVC voice model: ekdom asol manush er moto meye/chele kontho (GPU lage; free Colab/HF ZeroGPU diye try kora jay).
• Nijer kontho onno bhashay (voice cloning, e.g. OpenVoice / XTTS) — apnar nijer golay Hindi/English.
• WhatsApp bot: voice note forward korlei bodle ferot pathabe (WhatsApp Business API — free tier e limited).
• Android app (PWA → TWA) Play Store e.