Load the demo clip or upload a WAV night recording.
The band label is a hypothesis to verify against a real call library, not a species ID. This is the research method: measure, propose, then confirm with a primary source.
How it works
Decodes a recording, runs a hand-written FFT to build a spectrogram, detects calls by their energy envelope, counts them, and labels the dominant frequency band.
What's real
- ✓Hand-written Cooley-Tukey FFT with Hann windowing — no DSP library
- ✓Real spectrogram, call detection, and frequency bands, tested
- ✓Upload your own WAV via the Web Audio API
Demo limits — honest about it
- ○The bundled demo clip is synthesized (clearly labeled) so the tool works with no recording on hand
In the field
Amazon biodiversity work near Tena feeds a real, peer-reviewed research paper.
EcuadorStack
Hand-written FFTWeb Audio APIVitest-testedRuns offline