Tone & Noise Generator⚠ Start at a moderate volume — reference tones at high level can damage hearing and monitors.
Tone & Noise Generator
Reference test tones, white & pink noise and a frame-accurate sync pop — leveled in dBFS, exportable to WAV.
Reference signals — a quick guide
What it is
A browser tone and noise generator for post and broadcast: line-up tones, white and pink noise for monitor and room checks, and a frame-accurate sync pop (2-pop). Everything runs locally with the Web Audio API — nothing is uploaded.
How to use
- Pick a signal: tone, white noise, pink noise or sync pop.
- Set the level in dBFS (−18 EBU R68 and −20 SMPTE presets) and the channel (L / R / stereo).
- Press Play to monitor, or set a length and Export WAV.
- For a 2-pop, choose the frame rate and export — the pop is exactly one frame long.
Use cases
- Line up levels with a 1 kHz tone at −18 or −20 dBFS.
- Check monitors and channel wiring with L / R routing.
- Calibrate room and speakers with pink noise (equal energy per octave).
- Drop a 2-pop two seconds before picture start for sync.
Level uses gain = 10^(dBFS/20): −18 dBFS ≈ 0.126, −20 dBFS = 0.1. Gentle 8 ms ramps avoid clicks on start/stop.