Anti-Detection Engine
3-stage spectral reconstruction wipes the fingerprints AI classifiers learn — without touching your perceived sound.
Mastering Engine · v5.0 · Live-Match™
Mastered for streaming. Undetectable by AI.
A signal-reconstruction engine that takes AI-generated audio from 96% detected down to 14%, delivered as 24-bit / 48 kHz lossless masters — in under 10 seconds.
Powered by Live-Match™ Calibration — auto-measured impulse response that locks the downloaded master to the exact character you heard in the live preview. The only mastering platform that does this.
Anti-AI Detection Pipeline
Before · Raw AI Output
96%
Detected as AI-generated by leading classifiers (LANDR Sentinel, AICheck, Suno-V).
After · Ciel PRO Master
14%
3-stage signal reconstruction — MP3 spectral wash, non-integer resample, clean master.
—82pt · Detection drop
< 10s · Process time
24-bit / 48kHz · Lossless output
24-bit
Lossless Output
<10s
Processing Time
94%
Detection Bypass
Engineered Signal
Built for the
Built for the
Streaming Era.
Hits the loudness, dynamics, and headroom targets streaming platforms require — while scrambling the spectral fingerprints AI classifiers learn to flag.
Sub-10s Mastering
Cloud-distributed signal chain processes a full track end-to-end in under ten seconds — no queue, no waiting.
Lossless 24-bit / 48k
Studio-grade WAV / FLAC output. Distribution-ready for Spotify, Apple Music, Tidal, and Bandcamp.
Live-Match™ Calibration
A 4096-tap linear-phase impulse response auto-measured from your browser audio chain. The download spectrum-matches what you hear live — bit by bit. No more "preview vs export" surprises.
True-Peak Limiter
Mastering-grade AudioWorklet limiter with 5 ms lookahead, oversampled inter-sample-peak detection, stereo-linked envelope, and smooth release. Brick-wall ceiling without the squash.
Zero-Wait Workflow
A rolling buffer silently captures the last 12 s of your live preview. Calibration happens in the background while you tweak — commit is instant. No 10-second processing screens.
The Pipeline
The mastering chain.
Five purpose-built stages that take a raw AI render through analysis, signal disruption, and finishing — each one tuned to weaken classifier confidence without touching what listeners hear.
Spectral Probe
Profiles AI fingerprints across 96 frequency bins.
MP3 Wash
Codec-induced phase noise scrambles the AI signature.
Non-Integer Resample
43.7 kHz pivot breaks aliasing patterns classifiers latch onto.
Pro Mastering
EQ, multiband compression, limiting — to streaming-ready loudness.
Detection Score
Run against four classifiers; ship only if < 20% confidence.
Workflow
How It works.
Three steps to a distribution-ready master.
1
Upload
Drop your audio file into the studio. WAV, MP3, FLAC — all formats supported.
2
Master & Check
Select a preset, run mastering, then check your AI detection score instantly.
3
Download
Preview your master free. Pay to download the full 24-bit lossless file.
Pricing
Invest in your sound.
Single-track precision or unlimited monthly throughput. Both deliver the full Ciel PRO chain.
Single Track
$4.99
/ track
Master one track, download once. Single format of your choice.
- 1 track · single format (WAV / FLAC / MP3)
- Live-Match™ calibration
- True-Peak limiter + 8 genre presets
- Lifetime download access
Pro Single
$6.99
/ track
One track, every format you need for release. With Anti-AI watermark.
- Pro Delivery Set — WAV + FLAC + MP3 (24-bit / 48k)
- Anti-AI v4 watermark — verified on every export
- Live-Match™ + True-Peak limiter
- Lifetime download access
Creator
$9.99
/ month
Unlimited mastering for creators who release continuously.
- UNLIMITED mastering, all formats
- Pro Delivery Set on every track
- Anti-AI v4 watermark on every track
- All 8 presets + Live-Match™ + True-Peak
- Cancel anytime · 7-day money back
Studio
$19.99
/ month
Power user features for serious producers and album projects.
- Everything in Creator, plus:
- Reference Track Matching — match any track's tonal balance
- Multi-Platform Export — Spotify / Apple / YouTube / Tidal LUFS targets
- Distribution Certificate (PDF) — LUFS + watermark verification
- Anti-AI Lab + priority queue + 24h support
- Coming soon: Stem-aware mastering, batch upload
Secure worldwide transactions powered by PayPal · Free tier: 30s preview + 1 watermarked track / month
What we guarantee · What we don't
We measure what we ship. We don't oversell what we can't control.
✓ We guarantee
- — Studio-grade mastering chain (Match-EQ, True-Peak limiter, multiband)
- — Anti-AI v4 watermark inserted at 19.5 + 19.7 kHz, verified per export
- — Live preview = downloaded master, 0.03 dB RMS match
- — Watermark survives WAV / FLAC (lossless) and 320 kbps MP3 round-trips
- — 100% client-side — your files never leave your browser
- — 7-day money-back, no questions asked
✗ We don't guarantee
- — Effectiveness against content-based AI detectors. Our watermark disrupts spectral fingerprints. Detectors that analyse melody, structure, or generation patterns work differently and may still flag your track.
- — Identical results on YOUR specific track. "MIPPIA 99% → 14%" is measured on a representative AI corpus. Your genre, mix density, and production style may yield different numbers.
- — Outcomes on third-party platforms. Spotify, Apple Music, YouTube, and distributors make their own decisions independently. Track removal, demonetization, or rejection are outside our control.
- — Future classifier behaviour. Detectors retrain continuously. Today's 14% may be 60% next month if classifiers learn our scheme.
- — Watermark survival outside the verified codecs. Tested for WAV / FLAC / 320 kbps MP3. Lower MP3 bitrates, Opus, AAC, or aggressive re-encoding may degrade or remove the watermark.
- — Copyright or licensing of AI-generated source material. Compliance with the AI generator's ToS (Suno, Udio, etc.) and your distributor's AI policy is your responsibility.
Ciel is an audio processing tool, not a legal compliance service. Always check your distributor's current AI policy before release. Full terms →
Questions
What you might be wondering.
Honest answers about how the pipeline works, what it can and can't do, and where the limits sit.
No, and we don't pretend otherwise. Classifiers retrain. We continually monitor leading detectors — SpecTTTra, MIPPIA, AICheck — and tune the pipeline as they evolve. Monthly Unlimited subscribers get free re-renders whenever the chain is updated.
No. The Anti-AI processing combines multiband compression, harmonic saturation (tanh), and an ultrasonic watermark above 19 kHz — all below the human hearing threshold. Classifiers rely on the spectral statistics we shift; your listeners hear a clean, loud, streaming-ready master.
In: WAV, FLAC, AIFF, MP3 — up to 32-bit float / 192 kHz. Out: 24-bit / 48 kHz lossless WAV by default. FLAC and 320 kbps MP3 also available with every render — all three formats from a single mastering pass.
Distribution policy is between you and the DSP. We don't disclose your inputs to anyone, and our masters meet the loudness/format specs every major DSP requires. Several distributors (DistroKid, AWAL, UnitedMasters) accept AI-assisted music; check current terms before release. This is a tool, not a legal shield.
Same mastering chain across every tier — only the deliverable and rights differ. Single ($4.99) is one track, single format. Pro Single ($6.99) adds the Pro Delivery Set (WAV+FLAC+MP3) and the Anti-AI watermark. Creator ($9.99/mo) is unlimited mastering with Pro Delivery and Anti-AI on every track. Studio ($19.99/mo) adds Reference Track Matching, Multi-Platform Export, and the Distribution Certificate. Cancel anytime.
Under
10 seconds per track on typical files. Longer tracks (over 5 minutes) may take up to 30 seconds. Multiple tracks process sequentially — submit, walk away, come back to download.We can't promise that. Spotify, Apple Music, YouTube, and distributors make their own decisions about AI-generated music — we have no control over those decisions, and policies evolve regularly. Our watermark reduces classifier confidence on the detectors we test against; it does not override platform terms of service. Always confirm your distributor's current AI policy before release.
No. Our watermark disrupts spectral fingerprints — it pushes MIPPIA confidence from 99% to 14% on our representative AI corpus today. Two important caveats: (1) classifiers retrain continuously, so today's number may shift, and (2) content-based detectors that analyse melody, song structure, or generation patterns work differently and may still flag your track. Treat the watermark as a layer of defence, not a final verdict.
We verify watermark presence on every export and round-trip the encoded file back to PCM to confirm. Verified codecs: WAV (lossless), FLAC (lossless), 320 kbps MP3. Lower MP3 bitrates (128/192), Opus, AAC, or aggressive re-encoding by a third party may degrade or remove the watermark — we cannot guarantee survival outside the verified codecs.
Platform decisions are independent of our service. We offer a 7-day, no-questions-asked refund on any purchase. Beyond that window we can't refund based on third-party platform actions (track removal, demonetization, account suspension), because those decisions are not under our control. Ciel is an audio processing tool, not a platform-compliance service.
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