LUFS loudness API

Expose loudness checks in the same workflow as musical metadata.

Beatlyze returns integrated loudness estimates alongside BPM, key, duration, and confidence fields, so your product can run practical audio QA from one API.

Run demo track Get API key

Integrated LUFS field in completed analysis resultsDuration and musical metadata in the same payloadAsync upload and URL analysis for product workflows

Submit

Upload a file or send a public URL.

Poll

Use the returned job ID.

Store

Save structured JSON in your product.

Example Beatlyze API

{
  "loudness_lufs": -8.1,
  "duration_seconds": 247.3,
  "bpm": 127.8,
  "key_notation": "Am"
}

Best fit

Use Beatlyze when the job is clear.

Use this page when you need loudness metadata for catalog QA, creator uploads, media pipelines, or normalization checks.

Loudness -8.1 LUFS

Useful for QA and normalization decisions.

Duration 247.3s

Pairs with loudness for media asset review.

Context BPM + key

Keep technical and musical metadata together.

Delivery JSON

No manual export step required.

Workflows

Where this API earns its keep.

These are product workflows where Beatlyze can replace manual tagging, brittle scripts, or an internal audio worker backlog.

Workflow

Creator upload QA

Flag tracks that appear too quiet, too loud, or outside expected catalog ranges.

Workflow

Media pipeline checks

Store loudness and duration as searchable metadata before assets reach downstream systems.

Workflow

Catalog normalization review

Use LUFS as a signal for review workflows instead of relying on subjective listening alone.

Decision points

A practical API contract for product teams.

Beatlyze is intentionally explicit about lifecycle state, uncertainty, and integration boundaries.

More than loudness

Beatlyze is useful when loudness needs to live beside musical fields, not in a separate one-off report.

API-first workflow

Submit a job, poll or receive a webhook, then store the JSON result in your own product.

Pricing

Start free, then choose a monthly quota.

Evaluate the response shape with the demo and a free key. Paid tiers are for teams that need predictable monthly analysis volume.

Free

€0 / month

Test the result shape and run low-volume experiments.

50 analysis jobs each month
Upload and public URL analysis
Polling workflow
Anonymous URL demo available before signup

Get API key

Most practical start

Starter

€19 / month

For a first production integration with predictable usage.

2,000 analysis jobs each month
Batch URL submissions up to 10 items
Webhook delivery support
Usage and billing status endpoints

Pro

€49 / month

For production apps and recurring catalog workflows.

10,000 analysis jobs each month
Higher-volume API usage
Webhook delivery logs
Self-serve billing portal when configured

FAQ

Common questions before integration.

Short answers for developers deciding whether Beatlyze fits the product they are building.

Does Beatlyze return LUFS?

Yes. Completed analysis results include loudness_lufs when the analysis succeeds.

Is this a mastering tool?

No. Beatlyze exposes analysis metadata for products and workflows. It does not master, normalize, or modify audio.

Can I run loudness checks in batches?

Batch jobs currently accept public URL items. Each accepted item becomes its own analysis job.

Related buyer pages

Compare adjacent Beatlyze use cases.

Each page maps the same API surface to a different developer job-to-be-done.