Cello tuner — C, G, D and A at 440 Hz
C2, G2, D3 and A3 — an octave below the viola. Bow each open string with a slow, even stroke near the microphone, and tune with the pegs first, fine tuners last. Tap a string to hear the note it should be.
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Press start and play a note
Standard tuning
Tap a string to hear its reference note.
Allow the microphone and play one string at a time. The nearest string lights up; turn the peg until the needle sits in the middle.