LRT MEDIA · CHECK Room tone at head and tail
Measures the silence before the first sound and after the last, in 10 ms steps, against your minimum and maximum.
LRT Media Check
Check every chapter.
Deliver with confidence.
Drop in a folder of recordings and see in moments whether each file meets your delivery specs, from room tone and loudness to MP3 bitrate.
Your audio never leaves your computer. Every file is analyzed right here in your browser.
Drop a folder of recordings here
WAV, MP3, M4A or AIFF. Other files are ignored.
Ready to analyze
Choose a folder of audio files and check them against your selected profile.
Customize
Delivery requirements
Changes apply to your next analysis. Save them to keep them as a named profile on this browser.
Runtime
Hours by narrator
Group files by narrator or character for split billing. Names ending in _M, _F or a character name (like _SARAH) are grouped for you.
Total runtime—Reading durations…
Billable—Excludes files named “Retail Sample”
| File | Runtime | Group |
|---|
Durations update to the exact decoded length once a file is analyzed.
What it checks
Every spec, every file, before you deliver.
Choose a delivery profile, or set your own, and Check measures each recording against it. You get a pass or fail for every file, a billable runtime, and a proof report you can keep with the project.
Loudness and peaks
Checks overall RMS level and the highest peak in dBFS, so chapters land in range before a reviewer hears them.
Noise floor
Averages the quietest tenth of the recording to estimate the room noise underneath your voice.
Format and file specs
Confirms the file type, sample rate and channel count, read straight from each file's header.
MP3 bitrate and CBR
Reads every MP3 frame to confirm the bitrate meets your minimum and that the encoding is constant (CBR).
Runtime and hours by narrator
Totals finished hours for the whole book and for each narrator or character, ready for split billing. Files named “Retail Sample” are left out.
Private by design. Check runs entirely in your browser. Your recordings are never uploaded, and your saved profiles stay in this browser on this computer.