This page runs WorldNet in your browser as WebAssembly. Nothing is uploaded. Harvest, CheapTrick and D4C estimate the F0 contour, the spectral envelope and the aperiodicity of the voice below, and Synthesis rebuilds the waveform from them. The pitch shift multiplies the F0 before the synthesis.
Original
“His nature must have been kindly.”
Voice: Linda Johnson, recorded for LibriVox, from the LJ Speech Dataset by Keith Ito. The dataset is in the public domain.
Analyze and resynthesize
Result
F0 contour estimated by Harvest, before the pitch shift:
- The first run downloads about 2.8 MB, mostly the .NET runtime. The code is compiled ahead of time, so nothing is compiled while you wait.
- In our check, the 16-bit result matched a native build sample for sample at every pitch shift offered here. Inside, the double-precision values can differ from a native build in the last digits, because WebAssembly carries its own math library. The native builds are the ones verified against the original.