How to Convert MP3, WAV, or FLAC to Dolby Atmos

Dolby Atmos is an immersive audio format designed for playback on complex sound systems and headphones. Mixing your music in Atmos can create wider, deeper, and more exciting listening experiences. The catch is that Atmos mixing is notoriously difficult, and in the traditional workflow you usually need access to the original isolated instrument tracks.

That is exactly why converting a finished stereo file into Atmos sounds impossible at first. A stereo MP3 already has the vocals, drums, guitars, bass, and ambience collapsed together. If you cannot isolate those parts, you cannot place them meaningfully into a 3D space.

The workaround is not a fake stereo widener. The better solution is an AI-assisted Atmos upmix: take a stereo MP3, WAV, or FLAC, isolate usable stems, map them to Atmos bed and objects, and export a proper ADM BWF / BW64 master you can inspect in a Dolby Atmos-capable workflow.

That is the approach shown in this video using Neural Analog.

What "Upmixing to Atmos" Actually Means

In this context, upmixing means transforming a stereo music file into a Dolby Atmos mix that is compatible with ADM BWF / BW64, the exchange format commonly used for Atmos music delivery and DAW handoff.

A good Atmos upmix should do more than make the song sound wider. It should:

• isolate important musical elements
• build a sensible Atmos bed for speaker playback
• add useful object movement or placement
• preserve the feel, punch, and timing of the original stereo mix
• translate well to binaural headphone playback

That is why the workflow matters so much. If you simply add reverb to a stereo file, you usually get mud. If you separate stems first, you can actually make musical placement decisions.

Can't I just separate stems in my DAW? The stems quality usually won't be good enough with local models. To run the latest stem separation models, you'll need a GPU. Neural Analog provides a browser-based interface to run those models in the cloud.

Why Standard Stereo-to-Surround Tools Usually Fall Short

Most traditional stereo upmix tools mostly do two things:

• widen the stereo image
• add generic ambience

That can make a track sound larger for a few seconds, but it rarely matches the quality of Atmos mix. These kind of cheap upmixes are tiresome for listeners and tend to sound like a gimmick, as if you just listened to a track in the toilets.

A more convincing result comes from recovering the parts of the arrangement first, then deciding what should stay centered, what should become ambience, and what should be widened or lifted.

The Neural Analog Workflow

Neural Analog's Export to Atmos workflow is built around exactly that idea: split the stereo file into stems, optionally process the stems further, then automatically map the result to Atmos bed and objects following practical Atmos conventions.

Step 1: Upload Your Stereo File

Start with a stereo MP3, WAV, or FLAC file in Neural Analog. This is especially useful when:

• you lost the original stems
• you only have an old bounce
• you are working from an AI-generated stereo file
• you want to preview what an Atmos version could sound like before doing a full manual mix

If the source is heavily compressed or artifacted, restore it first. Neural Analog also offers browser-based restoration tools such as AudioSR, which can help recover clarity and detail before stem splitting.

Step 2: Split the Music Into Stems

Choose the 6 stems preset to separate broad musical groups such as vocals, drums, bass, guitar, keys, and other content.

This is the core reason the workflow works at all. Once the instruments are separated, they no longer have to stay collapsed into two channels. They can be distributed between the Atmos bed and object tracks instead.

Note: You can select the Restore stems option to upscale each resulting stem to 48 kHz, which can help improve their quality. For quick experimentation, we recommend the FlashSR model.

Step 3: Make the Upmix More Interesting

Now, we can keep breaking down the stems to make the Atmos result more interesting. For example:

Isolate the Vocal Reverb

Use the Remove reverb stem splitting preset on the vocal stem to create:

• a dry vocal
• a reverb-only layer

The reverb layers are panned wider in the Atmos bed. On headphones such as AirPods, that separation can make the mix feel much larger without sacrificing intelligibility. On speakers, it gives the feeling that the vocals are larger.

Split the Drums Further

Use the 5 drums track preset on the drum stem to create separate tracks for kick, snare, hi-hats, toms, and cymbals.

This gives you a more interesting Atmos result on bass-heavy systems and home-theater-style setups. The kick and bass can stay grounded and powerful on the bass channel, while cymbals and ambience feel wider and more open.

... And split even more

Use the SAM Audio model to prompt for more specific stems. For example, you can ask for a "guitar solo" stem, a "vocal harmony" stem, or a "piano" stem.

You can also use lead back to separate the lead vocals from the backing vocals.

The more stems you have, the more interesting the Atmos mix can be. To avoid including a stem to the mix, simply click the little arrow in the top right of the stem to hide it. Only the visible tracks and audible (unmuted) tracks will be included in the Atmos export.

Step 4: Export to Atmos with Neural Analog with Proper ADM BWF / BW64 Metadata

Once the stems are ready, click Export and select Export to Atmos.

Neural Analog automatically maps the isolated instrument tracks into an Atmos structure with a proper bed and object layout. The resulting ADM BWF / BW64 export is designed to include:

• binaural metadata for headphone playback
• an Atmos bed suitable for speaker-based listening
• 48 kHz delivery-ready audio
• phase alignment with the original stereo reference
• mastering-oriented targets such as -18 LUFS / LKFS and -1 dB true peak

That combination matters because Atmos delivery is not just about placing sounds in 3D. It is also about creating a file that can pass through real-world delivery workflows.

Step 5: How to Listen to the Atmos Export?

Even though the export may use a .wav extension, an ADM BWF / BW64 Atmos master is not something you should expect to review properly in a traditional media player. You cannot just Open the file in VLC.

Instead, here are some practical options for listening to the Atmos export:

1. Import the ADM BWF into your DAW, such as Logic Pro or REAPER. They usually have built-in support for ADM BWF files and can render the Atmos bed and objects in real time for monitoring.
2. Use the Dolby Atmos Renderer, which is a paid tool with a free trial.
3. Use Cavern / Cavernize, a free PC-based option recommended here for playback and conversion workflows.

Step 6: Open the Export in Logic Pro, REAPER, or Another Atmos Tool

Logic Pro

Logic Pro can create a project directly from the exported Atmos master:

File > Import > Create Project from ADM BWF

That is useful for final level checks, panning tweaks, renderer comparison, and listening tests across speaker and binaural monitoring modes.

REAPER + EAR Production Suite

For a flexible and lower-cost workflow, REAPER plus the free EAR Production Suite is a strong option.

EAR is an open-source ADM workflow designed around REAPER. It is optimized for importing and exporting ADM content within a BW64 container and is ideal for checking object placement, bed structure, and overall immersive organization.

Imported and ordered Atmos tracks in REAPER after opening the Neural Analog export.

Dolby Atmos Renderer

If you want a dedicated renderer outside the DAW, the official Dolby Atmos Renderer is another option. It is useful for review, validation, and dedicated monitoring workflows.

Cavern / Cavernize

For Windows and PC-based listening, Cavern and Cavernize provide a free way to handle Atmos-related playback and conversion tasks. That makes them a practical option when you want to audition content without committing immediately to a full commercial Atmos monitoring stack.

Delivery-Friendly Specs Matter

Distributors such as DistroKid let you import an ADM BWF / BW64 file directly for Atmos delivery.

Technically, the file you export from Neural Analog matches the technical requirements required for delivery, but we don't recommend you to do that. Importing Atmos content to Distrokid or to distributors platform carries additional financial costs. So we recommend you to use this as a starting point for a more detailed manual mix, rather than as a final delivery format. Feel free to reach out for professional mastering services with an experimented Atmos engineer.

Why This Workflow Is Useful

This workflow is especially compelling for:

• legacy tracks with lost stems
• catalog material that only exists as stereo
• AI-generated songs that need a fast Atmos version
• engineers who need a head start before manual Atmos refinement
• artists who want to hear their music in spatial audio without rebuilding the whole song from scratch

It is not a replacement for a handcrafted Atmos mix from the original multitrack session. But it is a practical and modern way to create an Atmos-ready starting point from a stereo master.