LISTENING ROOM / MEASURE THE SIGNAL
Give your audio
a level check.
Measure a WAV excerpt locally. Compare an RMS reference and see the peaks that limit a gain change.
01 / SOURCEWAV
Mono / stereo. PCM 16-bit or IEEE float 32-bit.
Up to 120 seconds and 25 MB. No MP3 or compressed/extensible WAV in this version.
Ready for a local file.
02 / SIGNAL SCULPTURE
Illustrative shape — choose a file for measured peaks.
03 / MEASURED LEVELS
Sample peak
dBFS · all channelsCrest factor
dB · peak minus RMSFull-scale samples
at digital endpoints / above · exact count in reportNATIVE PEAK ENVELOPE
128 time bins per channel, or fewer for a short file. Heights are capped at full scale; numeric measurements remain exact. Quiet bars represent a peak envelope, not a spectrum or LUFS meter.
| Channel | RMS dBFS | Peak dBFS | DC mean |
|---|
04 / COMPARE A WORKING REFERENCE
The default is an adjustable working reference, not a platform publishing target. Sample-peak ceiling for this scenario: −1 dBFS.
This is linear-gain arithmetic, not a processed audio file. A sample-peak ceiling does not protect against inter-sample peaks or later codec overshoot. It cannot predict playback volume or listener preference.
THE MEASUREMENT
Signal level, with clear units.
RMS is the square root of the mean squared sample amplitude over the whole excerpt and all channels, including silence. Its dBFS value is 20 × log10(RMS), with amplitude 1 as full scale. Stereo channels are measured separately and their energy is averaged for the combined RMS; they are not downmixed.
Sample peak is the largest absolute sample. Full-scale counts identify integer endpoints or float samples at/above amplitude 1; they do not by themselves prove audible clipping. Crest factor is peak dBFS minus RMS dBFS. Digital silence has no finite dBFS level.
THE LIMITS
RMS is not perceived loudness.
No K-weighting, perceptual gating, LUFS, true-peak oversampling or playback calibration is performed. A loudness publishing requirement needs the right measurement method. Audacity explains RMS and LUFS normalization separately ↗.
The tool reads only the chosen supported WAV, and changes no audio. File details and signal values are not sent to a server. The 3D scene uses only the same derived peak bins shown in the native envelope; disabling it keeps the measurements available.