EXPERIMENTAL · BROWSER AUDIO

Audio Signal Generator & Analyzer

Generate a known digital reference signal, download a checked PCM WAV, or inspect what a browser-visible audio input is actually delivering.

Digital reference only. dBFS describes samples before OS, interface, amplifier and loudspeaker controls. It is not SPL or an analogue calibration claim.

MASTER SAFETYGenerator stopped · Input analyzer off

QUICK TEST

Known signals, one action

STOPPED

REFERENCE TONE

Tone, level and routing

Frequency Hz Signal level Monitor trim

Channel routing

Both sends the same mono signal to L and R. Right Inverted sends R = −L for downstream polarity and mono-sum checks; it does not prove loudspeaker wiring polarity.

SWEEP & NOISE

Listening and routing references

Start Hz End Hz Duration s Mode

REFERENCE FILE

Download PCM WAV

LOCAL ONLY

The file is generated in this browser. Nothing is uploaded.

Signal Frequency Hz Level dBFS Sample rate Bit depth Duration Channels Stereo routing

Ready · 48 kHz · 24-bit PCM · stereo

INPUT ANALYZER

Real browser input

OFF

Audio analysis runs locally in your browser. Audio is not uploaded.

Input device

If speakers are playing a test signal while a microphone is active, use low monitor level, headphones or controlled routing to avoid feedback.

REQUESTED2 channelsAGC off · echo cancellation off · noise suppression off

RECEIVEDNot enabledActual track settings appear here

MONOPeak −∞ · RMS −∞

−60−30−18−90

CLIPPeak hold: −∞ dBFS

STEREO CORRELATION—

−10+1

Available only when the browser reports a real two-channel input. Persistent strongly negative correlation can indicate a mono-compatibility or polarity problem; negative values are not automatically wrong.

Spectrum shows the first input channel only (L for stereo). Waveform and meters show both channels when stereo is reported.

Enable input to begin

FFT size Smoothing

Peak is the highest sample excursion in the current block. RMS is signal energy over the displayed analysis window; it is not loudness or LUFS. CLIP lights at −0.1 dBFS or above.

SYSTEM / DEVICE INFO

Browser audio path

Audio context: Not initialized
Base latency: Not reported
Output: System default
Input capability: Permission not requested

Checking browser support…

Browser-reported base latency is not end-to-end system latency. It does not include the complete interface, mixer, network or loudspeaker path.

WORKFLOW NOTES

What these references mean

−18 dBFS

EBU R 68 recommends an alignment level 18 dB below digital full scale. This preset generates that digital sine peak; downstream analogue alignment remains your system’s job.

−20 dBFS

SMPTE RP 155 specifies a 1 kHz digital reference signal at −20 dBFS. Other reference practices exist, so declare which level your workflow uses.

Browser input

The analyzer reports browser samples and actual settings exposed by the input track. It is not a calibrated analogue meter, acoustic analyzer or certified spectrum instrument.

Primary references: EBU R 68, SMPTE RP 155, ITU-R BS.1726, Web Audio API, and Media Capture and Streams.