PitchSense

PitchSense answers the question every engineer asks mid-soundcheck: "that ring is around 315 Hz — what is it?" Type a frequency and you get the nearest note, how many cents off it sits, its MIDI number, the ISO 1/3-octave band and the fader on a 31-band graphic EQ, and its wavelength. Type a note and you get the frequency back. Every note on the page is derived from one A4 reference that you choose.

Who it is for

• Live and studio engineers naming a ring or a problem frequency and finding the fader for it.
• Producers and system techs tuning a kick, an 808 or a sub to the key of the song, or working out a quarter-wave distance.
• Orchestral and baroque players whose ensemble tunes to 442, 443 or 415 Hz.
• Students and teachers who want the equal-temperament table and the harmonic series without a textbook.

To tune an instrument, use the tuner in BPM Forge (presets, drop tunings, strobe view). To find a feedback ring automatically, use SpectraSense.

What makes it different

• Both directions, with cents. The converter shows the offset to 0.1 cent. The maths is exact.
• The engineer's view. The ISO band, the GEQ fader, the wavelength and the quarter-wave distance for any frequency — see The engineer's view.
• Kick and sub to the key. Pick the key of the song and read the low notes that fit it.
• Any A4. Buttons for 440, 442, 443, 415 and 432 Hz, and a field for any other value.
• Hear it. Every value has a play button, and a sustained drone holds a reference for as long as you need it.
• A microphone reading for rings and single notes, about 30 Hz to 3 kHz, with a note history and a big-digit stage view — see Name a note from the microphone.
• Your language. The tool speaks 11 languages; German uses German note names (H for B), and Do-Ré-Mi names can be switched on.
• 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 panels, the A4 reference, and playback.
• The engineer's view — band, fader, wavelength and the kick-to-key table.
• Name a note from the microphone — name a ring or a note 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.