Microphone access blocked

PitchLab needs microphone access to detect pitches. It looks like permission was previously denied. Here's how to fix it:

  1. Tap the three-dot menu (⋮) in Chrome
  2. Go to Settings → Site settings → Microphone
  3. Find pitchlab.bridging21.com and tap it
  4. Change permission to Allow
  5. Return here and tap Start listening again
  1. Open the iPhone Settings app
  2. Scroll down to Chrome (or Safari)
  3. Tap Microphone and set it to Allow
  4. Return here and tap Start listening again
  1. Click the lock icon in the address bar
  2. Find Microphone and change it to Allow
  3. Reload the page and tap Start listening

PitchLab

Tuner, pitch identifier, and overtone viewer for any instrument.

Play Keyboard →
Detected note
—
Frequency
— Hz
Target: —
Tuning
Waiting for sound…
Microphone is off.
Spectrum / overtones

Teal bars mark your fundamental pitch. Amber bars are the overtones — whole-number multiples of the fundamental. Grey bars are other sound (breath, room noise). Floating lines show recent peaks as they decay.

Best results: use a sustained single note, avoid background noise, and keep the sound steady. Designed for rehearsal and teaching use, not laboratory-grade measurement.