See a 440 Hz Tone’s Pitch with CREPE

The useful part

CREPE Pitch Tracker is featured here for one specific job: browser-based pitch curve and musical-note histogram. This guide focuses on that workflow so you can decide whether it fits your task before trying it.

What happened in the demo

Meet CREPE Pitch Tracker. This original test has two seconds of a 440-hertz tone, with silence at both ends. Here’s the recorded result: a pitch curve on a musical grid. The median reads 440.4 hertz, A4. The histogram puts every voiced frame at A4. That’s a handy way to inspect this known test tone.

The example used in the reel

A small, specific input makes the result easier to inspect. Use the example below to understand the scope of the recorded workflow; it is not a promise that a new run will produce an identical result.

Original two-second 440Hz sine wave, 0.25 seconds of silence at each end; confidence threshold 0.50 and 16ms hop.

Try it yourself

1. Load CREPE Pitch Tracker
2. Choose the original 440Hz test tone
3. Run Trace pitch with confidence 0.50 and 16ms hop
4. Inspect the curve and note histogram

Start with material you own or have permission to use. Save the original and compare it with the output before moving the result into a real project. If the interface has changed, follow the current official instructions linked below.

What to check before using the result

The recorded median is 440.4Hz, A4, with all 127 voiced frames in A4. The input is a synthetic known tone, not a general accuracy benchmark.

Keep the task narrow on your first attempt. Check the details that matter to your use case rather than judging only whether the result looks polished. A successful short example is a useful introduction, not a benchmark of the whole product.

Access, free demos & limits

Free public on-device demonstration verified on 2026-11-02 in the recorded example. No account or payment required. Initial model download is approximately 2 MB; browser processing and caching are described on the official demo page.

Availability notes refer to the dated demonstration or source check. Features, limits and sign-in requirements can change. Check the official site before starting a larger project.

Sources & context

• webai.show/models/pitch-detection/ ↗Source checked 2026-11-02

This guide expands the channel’s recorded example and the official sources checked for that reel. Generated results are examples, not endorsements or guarantees. Read our editorial policy.