Vaani · वाणी

Acoustic Voice Profile for IELTS & TOEFL Speaking

Vaani measures your formants, pitch, and voice quality with Praat and Whisper, then reads them against L1 transfer attractors empirically calibrated for Bengali and Hindi speakers. You receive a measured Pronunciation band and a voice profile — fluency, lexical resource, and grammatical range still require a human examiner.

Free first attempts · Practice plan ₹299 · No card required to try

Measured, not predicted

Every band point is traceable to an acoustic measurement on your audio — F1/F2 formant placement, pitch range, jitter, shimmer, HNR.

Calibrated for Indian L1 transfer

Bengali and Hindi attractors are empirically calibrated from the Svarah corpus, not literature defaults. Each transfer event comes with a timestamp.

Honest about scope

Pronunciation band only. The other three IELTS speaking criteria need a human examiner — we will not auto-score what acoustics can't measure.

Loading the recorder…

JavaScript is required to record and analyse your speech.

The browser microphone, audio upload, and acoustic analysis pipeline all run client-side. You can still reach me below — the form opens your email client with a prefilled message.

Or email neilshankarray@vaaani.in directly.