pitchtuner

noun
UK /ˈpɪtʃˌtjuːnə/
US /ˈpɪtʃˌtuːnər/

A small tool or app that helps you make a musical note sound just right.

She used a pitchtuner to make sure her guitar string was in tune.


OTHER MEANINGS

2. A person who adjusts the pitch of instruments or voices.

The pitchtuner worked backstage before the concert.

3. A feature in audio software that corrects off-key singing.

The pitchtuner smoothed out the singer's high notes.

4. A device that measures how high or low a sound is.

The pitchtuner showed the whistle was very high.