Intelligent Analysis
Auto-detects loudness, dynamics, stereo risk, and tonal imbalance to set a smarter starting point for your master.
Master your music for free
Upload your mix, pick a style, and Auracle will intelligently analyze and master your track in seconds. All processing happens in your browser — your audio never leaves your device.
100% Free
No Signup
Runs Locally
MP3 & WAV
Drop your track here to get started
We'll analyze it and apply intelligent mastering automatically
WAVMP3
Processing...
01InputPrep
Gain0 dB
HP Filter30 Hz
028-Band EQTone
03Multiband CompressorDynamics
Low Thresh-24 dB
Low Ratio3:1
Mid Thresh-20 dB
Mid Ratio2.5:1
High Thresh-18 dB
High Ratio2:1
Low/Mid X200 Hz
Mid/High X3000 Hz
04Stereo ImageWidth
Width120%
Bass Mono120 Hz
M/S Balance0
05Harmonic ExciterColor
Drive15%
Type
Mix50%
06Brickwall LimiterLoud
Ceiling-0.3 dB
Threshold-6 dB
Release100 ms
Makeup0 dB
GR
0 dB
Output
-∞ dB
07DitheringFinal
Type
Bit Depth
How Auracle Masters Your Music
Auracle scans your audio to measure integrated loudness, true peak, loudness range, spectral balance, stereo risk, and artifact patterns. It then configures a professional mastering chain — input conditioning, 8-band parametric EQ, 3-band multiband compression, stereo image processing, harmonic saturation, final limiting, and TPDF dithering — all optimized for your specific track.
DSP Upload Ready
Auto mode targets -14 LUFS with -1.0 dBTP true peak for safer Spotify, Apple Music, YouTube, Tidal, and Amazon Music uploads.
8-Band Parametric EQ
Shape your tone across the full frequency spectrum with interactive visualization.
Multiband Compression
Control dynamics independently across low, mid, and high bands with adjustable crossovers.
Stereo Widening
Enhance stereo image with mid/side processing and bass mono-summing for streaming compatibility.
Harmonic Exciter
Add warmth with three saturation models — tape, tube, and transistor.
Brickwall Limiter
Maximize loudness more safely with a final limiter and true-peak safety trim.
AI Fix (Gentle)
Reduces metallic shimmer and unstable stereo in AI-generated music with subtractive EQ, tighter high-band control, gentler limiting, and minimal saturation.
FAQ
Is Auracle really free?
Yes — 100% free with no signup, no upload limits, and no watermarks.
Is my music uploaded to a server?
No. All processing happens locally in your browser using the Web Audio API.
What formats are supported?
MP3 and WAV input. Export as WAV at 16, 24, or 32-bit float, or as MP3 at 320 kbps.
Can I hear changes in real-time?
Yes. The live effects chain processes audio as you listen. Export remains the most accurate version, especially for final stereo image and limiting behavior.
Is the output ready for Spotify and Apple Music?
Yes. Auto (DSP Ready) mode targets -14 LUFS integrated loudness with a -1.0 dBTP true peak ceiling. Output is 24-bit WAV with TPDF dither.
Can Auracle fix AI-generated music?
It cannot fully reconstruct damaged AI audio, but the AI Fix (Gentle) preset can often reduce brittle highs, metallic shimmer, unstable stereo, and harsh upper-mid texture.
How does this compare to LANDR?
Auracle uses many of the same core techniques — analysis, EQ, multiband compression, saturation, stereo processing, and limiting — but runs entirely in your browser for free.
How to Prepare a Mix Before You Master It
A mastering tool works best on a balanced mix with enough headroom. If your kick is distorting, your vocal is buried, or your stereo image is unstable, mastering can only polish those problems, not fully undo them. For best results, export a clean stereo mix, avoid clipping on the mix bus, leave obvious corrective moves to the mix stage, and use mastering for final tone, loudness, width, and delivery.
1. Leave headroom
Auracle can raise loudness safely, but it performs best when the source is not already crushed. A mix that peaks below 0 dBFS and still breathes usually masters better than one that is already slammed.
2. Fix the mix first
If the low end is wildly uneven or the snare is painfully harsh, correct that in the mix when possible. Mastering is strongest when it makes broad, musical finishing moves.
3. Pick the right preset
Use Auto for streaming-safe delivery, genre presets when you want more flavor, and AI Fix only when a track truly has brittle, metallic, unstable artifact patterns.
4. Trust your ears
The processed waveform and meters help, but your ears still matter most. Toggle between original and processed playback and watch for dullness, pumping, or over-bright tops.
Original Guides and Reference Notes
Streaming loudness in plain English
Most streaming services turn loud songs down. That means a master that is simply louder is not automatically better. In practice, a controlled, clean, balanced master often survives normalization better than an over-limited one.
- Use Auto when you want a safer streaming target.
- Use louder genre presets when you want more density and energy.
- Watch true peak and harshness, not just overall loudness.
What AI cleanup can and cannot do
Auracle can often reduce brittle highs, unstable stereo, and metallic shimmer, but it cannot fully reconstruct damaged transients or replace a bad generation with a perfect recording. Think of AI Fix as artifact taming, not full restoration.
Why mono bass matters
Very wide bass can collapse badly on phones, club systems, or mono playback. Auracle can mono-sum the lows below a chosen point so the center stays punchy and more translation-friendly.
Why some masters look smaller after processing
A processed waveform is not always visually bigger. Corrective EQ, trimmed silence, safer true-peak control, and preserved dynamics can produce a waveform that looks less inflated while sounding more polished and more portable across playback systems.
About Auracle
What this site is
Auracle is a browser-based audio mastering tool and educational product page. The application runs locally in the browser and is paired with original editorial content explaining how mastering works, how to prepare mixes, what the presets do, and what the tool can and cannot fix. The goal is to provide both utility and genuinely useful publishing content on the same page.
Advertising and Disclosure
Ad disclosure
This site may display advertising, including Google-served ads, in designated placements on content-rich sections of the page. Ads do not influence the processing results of the mastering tool.
Editorial independence
The educational sections on this page are original explanatory content written to help users understand mastering, streaming delivery, and the limitations of automated audio cleanup. They are not sponsored reviews.
Contact
Get in touch
Questions about the site, privacy practices, or business matters can be sent to auracle@djh3mp.com.