PitchSense

PitchSense answers the question every engineer asks mid-soundcheck: "that ring is around 315 Hz — what note is that?" Type a frequency and you get the nearest note, its exact frequency, its MIDI number and how many cents off it sits. Type a note and you get the frequency back. Everything on the page is derived from one A4 reference that you can change.

Who it is for

• Live and studio engineers naming a ring or a problem frequency.
• Musicians and singers who need a reference tone or a quick tuner.
• Orchestral and period players whose ensemble is not at 440 Hz.
• Students and instrument techs who want the equal-temperament table and the harmonic series without a textbook.

What makes it different

• Both directions, with cents. Most converters round to the nearest note. PitchSense shows how far off you are on a ±50 cent gauge.
• A selectable A4. 432 to 444 Hz. Every note, harmonic and table value re-derives from it.
• Hear it. Every value has a play button: sine, triangle, square or saw, at the volume you set.
• A live microphone tuner that drives the same cents gauge.
• The whole table on one page. C0 to B8 with MIDI numbers, searchable by note, MIDI or Hz.
• Shareable. Your readout lives in the page URL, so a bookmark or a pasted link opens exactly what you were looking at.

Pages in this guide

• Getting started — the four panels, the A4 reference, and playback.
• Tune from the microphone — tune from the microphone.
• Share or bookmark a readout — bookmark or send an exact setup.
• FAQ — cents, temperament, A4 and accuracy.
• Troubleshooting — no sound, no microphone, wrong note.