Calibrate your whistle
Many whistles play certain notes a touch sharp or flat — measuring your specific instrument once means /practice can grade your playing against your whistle's actual tuning, not a generic average.
⚠ No calibration saved for this browser
/practice will grade against equal-tempered tuning, which can mis-label notes if your whistle drifts. Run the wizard below to fix. (Calibration is per-browser-and-origin; if you calibrated on a different URL or browser, that data isn't visible here.)
We'll walk through 8 notes (the D-major scale). For each note: play it steadily, the bar fills as we capture, then you confirm the reading and move on. Mistakes are fine — you can recapture any note. Takes 1-2 minutes.