# Recording Intake QC: Noise Changes, SNR and Bit-Depth Review

Preserve incoming recordings, inspect low-level changes, estimate SNR only with a valid noise reference and review integer bit occupancy before handing off a traceable intake decision.

> Canonical page: https://elysiatools.com/en/hubs/recording-intake-noise-snr-and-bit-depth-review

- **Keywords:** recording intake quality control, audio noise timeline review, noise reference SNR, integer audio bit occupancy, recording acceptance report

## Frequently asked questions

### Does the timeline extract the actual noise floor?

No. It computes a low-percentile RMS proxy from nonzero short windows; speech, music, DC and gain can dominate it. Silent windows are counted separately and do not become a measured noise floor.

### Can I estimate SNR from a digital-silence gap?

A zero-noise reference produces an unavailable ratio, not infinite SNR. Use a genuinely representative noise-only region; without one, record that SNR could not be assessed.

### Do eight low zero bits prove that a 24-bit file is fake?

No. They describe the observed integer samples. Dither, gain and processing can change low-bit occupancy; neither occupancy nor container width proves recording history, ENOB or quality.

### Do the reports replace listening or certify the whole recording?

No. A reviewer must check relevant audio and document scope. The analyzers do not repair audio, and excerpts or selected SNR regions cannot certify the rest of a long source.

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- [Interview Session Noise Profile Reuse and Reviewed Delivery](https://elysiatools.com/en/hubs/interview-session-noise-profile-reuse-and-reviewed-delivery): Group interview recordings by actual noise conditions, save a noise-only profile, test reuse on representative originals and deliver individually auditioned cleanup copies with processing records.
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