Play a note on your piano and the tuner detects it via microphone, highlights the corresponding key on the keyboard display, and shows how many cents sharp or flat you are. The tuner covers four octaves centered on the middle of the piano range (C3–C7).
For tuning a digital piano or keyboard, this works very well — just play one note at a time and observe the cents indicator. For acoustic upright or grand pianos, the tool is useful for checking whether a note is in tune, but professional piano tuning requires physical adjustment of string tension. Record your practice with speakandrecord.com. Practice timing with our free metronome.