Free Audio Mastering
Try free audio mastering online with your mix and a track you love. Hear a release-ready result in seconds—no sign up required.
Upload your mix, or drop it here
WAV · MP3 · FLAC · AIFF · M4A
Up to 200 MB · processed privately in your browser
Add your reference track
WAV · MP3 · FLAC · AIFF · M4A
Up to 200 MB · processed privately in your browser
Key features
Reference mastering works when it turns a subjective request such as “closer to this record” into useful, bounded decisions. AI Mastering measures the reference, compares it with your mix, and coordinates the final chain while preserving the identity, arrangement, and performances in your own audio.
AI Mastering reads the broad frequency shape of both files and looks for meaningful differences in low-end weight, midrange density, presence, and air. The match is intentionally restrained: it guides the source toward a compatible balance instead of forcing every narrow resonance from the reference onto a different arrangement.
Best for translating a clear tonal direction across different songs.
A reference can sound exciting because of arrangement, performance, or mix movement—not only compression. The workflow compares overall density and transient behavior, then combines that evidence with your selected loudness profile so the master can gain impact without flattening the verse-to-chorus contrast that makes your mix work.
The target informs compression; it does not erase your dynamics.
Width is treated as a frequency-aware decision. AI Mastering can move the image toward the reference character while keeping the low end stable and avoiding an indiscriminate widening pass. This is especially useful when the target feels spacious but your mix still needs dependable mono compatibility and a centered rhythmic foundation.
Reference width becomes guidance, with mono bass kept in view.
The reference may be louder than the destination you actually need. AI Mastering separates its creative density from your chosen release profile, then applies coordinated gain, soft clipping, and true-peak protection. The result follows a deliberate delivery direction instead of blindly copying a measured loudness number.
Platform targets and peak safety stay under your control.
After processing, switch between the original and mastered versions at the same musical moment. Listen for vocal placement, kick and bass focus, depth, brightness, and fatigue. A level-aware comparison helps you decide whether the reference direction improved translation rather than rewarding the version that is simply louder.
Matched playheads make focused A/B decisions easier.
The reference recording is analyzed as a target; it is never sampled, mixed into, or used to replace any part of your song. Your output contains your source audio processed through the mastering chain. That boundary makes the tool useful for creative direction without pretending one production can or should become another.
No reference audio is copied into the exported master.
How to use it
A useful match begins with two intentional files and one clear listening objective. The studio keeps those choices visible, so you can refine the direction without rebuilding a session or handing control to an opaque preset.
Choose the finished stereo mix you own or are authorized to process, then add a commercially released track, approved client target, or previous production that demonstrates the direction. WAV or another lossless source is ideal, although WAV, AIFF, FLAC, MP3, and M4A files up to 200 MB are supported.
Select the closest genre, platform target, tonal profile, and loudness character. These controls tell AI Mastering which reference traits matter for this delivery. If the reference is extremely bright, wide, or dense, your release settings provide the guardrails that keep the result appropriate for your song.
Create the master, then compare it with the original on headphones and familiar speakers. If the low end moved too far or the chorus lost movement, adjust the controls and rerender. One authorized source project includes every mastering mode and unlimited setting revisions during its retention period.
Your mix → Reference direction
Compare → Guide
Tone
Guided
Width
Protected
Audio copied
None
Why AI Mastering
A black-box “match” button can create the wrong kind of confidence. AI Mastering keeps the source, reference, delivery target, and adjustable mastering choices in one visible workflow, making it easier to understand why a direction changed and when to stop.
The heavy decoding, measurement, and mastering work runs in your browser rather than waiting in a remote processing queue. You can choose both files and configure the studio before signing in. Authorized projects store the original and latest master privately for protected history and downloads.
A new exact filename and SHA-256 source costs 10 credits. After authorization, you can try another reference, change release targets, adjust advanced settings, or switch to standard Mastering and Mix + Master without another project charge while that source remains available.
The reference provides evidence, not an irreversible command. Familiar genre, sound, loudness, and advanced controls remain available so you can keep the traits that fit and reject those that do not. The final artistic and release decision stays with your listening judgment.
Where it fits
A reference is most useful when it communicates one or two priorities. Choose a track because its low-end focus, vocal presence, density, or spatial character answers a real question about your release—not merely because it is popular.
Use one trusted direction across a single or short release when songs were mixed at different times. Compare each result by ear; the goal is a related tonal and dynamic family, not identical curves.
Turn a client’s listening reference into a concrete preview before final approval. The result can reveal whether the requested brightness, width, or density helps the production or exposes a mix revision that should happen first.
Explore how a mix responds to a relevant genre benchmark while keeping a platform loudness target and true-peak ceiling in the chain. This separates creative direction from delivery compliance.
Final quality check
Two songs have different arrangements, keys, tempos, and performances, so a useful result will never be a numerical clone. Review the master as music and use the reference to focus your attention.
Check whether kick, bass, and low synths feel more controlled without losing their intended weight. A sparse reference can mislead a dense arrangement, so prioritize clarity over identical energy.
Listen at a low monitor level and confirm that the vocal or lead remains stable, natural, and appropriately forward. Extra presence should not turn sibilance, guitars, or cymbals brittle.
Play the full song, not only the loudest chorus. If the matched version becomes tiring, narrow the target, reduce intensity, or choose a more dynamic loudness profile before rerendering.
Simple project pricing
Set up the mix, reference, and release direction before signing in. AI Mastering charges for a new source project rather than every experiment, so you can revise the reference and settings while the project remains active.
Studio setup
Free to configure
Choose your local audio, switch between all three mastering modes, and set the release direction. Sign in when you create a master to authorize processing, history, and download.
Start configuringFull source project
10 credits
Unlock Mastering, Reference Mastering, Mix + Master, protected download, and unlimited parameter rerenders for the same source during retention.
Compare AI mastering plansFAQ
Practical answers about choosing a reference, supported files, audio copying, privacy, limitations, project credits, ownership, export, and when a mastering engineer is the better choice.
AI Mastering analyzes broad tonal balance, stereo character, dynamics, and loudness behavior in the reference, then uses that information as a target for your mastering chain. It does not reproduce the reference arrangement, instruments, performance, or mix automation. Because songs differ, the goal is a compatible direction that improves your source—not a mathematically identical spectrum.
Choose a well-produced track that represents the specific quality you want: focused low end, clear vocals, open highs, controlled density, or a stable stereo image. Prefer a similar genre and arrangement density, and use the highest-quality legitimate file available. One focused reference is usually more useful than a track chosen only because it is currently popular.
No. The reference is decoded and measured for target characteristics, but its samples are never mixed into or substituted for your source. The exported master contains your own audio processed through AI Mastering’s mastering chain. Reference analysis cannot grant rights to copy a melody, recording, performance, or other protected creative material.
You can choose WAV, AIFF, FLAC, MP3, or M4A files up to 200 MB for both the source and reference. Lossless WAV, AIFF, or FLAC files generally provide the cleanest basis for comparison. A completed project exports a 48 kHz, 24-bit WAV, plus a 320 kbps MP3 when the browser supports the required encoder.
No. AI Mastering analyzes their characteristics and combines the reference direction with the loudness and release profile you select. Do not normalize or heavily limit your mix merely to make the meters agree. Export the source that reflects your actual mix decisions, avoid clipping, and let the mastering controls establish the delivery level.
It can improve broad balance, density, width, and peak behavior, but it cannot reliably undo clipped audio, severe masking, an overcompressed vocal, or a kick and bass conflict embedded in a stereo file. If one element is consistently wrong, revise the mix or use Mix + Master when local stem separation can create enough control for a useful rebalance.
The heavy audio analysis and processing runs locally in your browser. Before authorization, the selected files remain part of that local studio session. When you sign in and authorize a project, AI Mastering stores the original source and latest master privately for project history and protected downloads. Review the current privacy and retention terms for account storage details.
A new source identified by its exact filename and SHA-256 costs 10 credits. The project then unlocks Reference Mastering, standard Mastering, and Mix + Master, along with unlimited setting revisions during retention. You can replace the reference or change the controls without paying for another source project, but renaming the source creates a different project identity.
You retain the rights you already hold in your uploaded source and the resulting master, subject to the site terms and rights attached to the material. You must have permission to process and release the source. Using a commercially released recording as an analytical reference does not give you rights to copy its composition, recording, samples, or performance.
Use a trusted engineer when you need a second set of expert ears, album sequencing, restoration, vinyl-specific preparation, complex delivery packages, or nuanced communication about an unusual reference. AI Mastering is especially useful for singles, demos, mix checks, client previews, alternate directions, and quick iterations where immediate, repeatable feedback matters.
Bring your mix and one purposeful reference, choose the release context, and hear a guided master without copying the recording that inspired it.
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