OBRA and RoEx Automix at a glance
| OBRA | RoEx Automix | |
|---|---|---|
| Free | 2 songs a day: all three masters, every control, a 24-bit WAV or FLAC download, no watermark | Starter: unlimited free previews and your first track free; its page says Pro removes the audio watermark for release-ready exports |
| Pay once | $3 / €3 / £3 per extra song (30 days of downloads of that song, 88.2 / 96 kHz and 32-bit float included); vocal + beat mix $5 / €5 / £5; album $9 / €9 / £9 | €6.99 per download on Starter |
| Subscription | OBRA PRO, $10 / €10 / £10 a month: unlimited mastering, album and vocal + beat mixes | Pro: €11.67 a month billed annually at €139.99, with unlimited downloads |
| Mixing | Vocal + beat mix (voice and instrumental); multitrack mix in the BRAVO web DAW at /mixing | Automatic mixing of up to 16 tracks on Starter, 32 on Pro |
| Mastering | Automatic mastering with three masters, a reference mode and album mode | Automatic mastering and reference-track mastering (Pro) |
| DAW workflow | Web page; no plugin | Pro: download processed stems, export to Ableton Live or as DAWproject (Bitwig and others), plus Automix Desktop (beta) |
| Account | None for mastering | Log in or get started for free |
| Where your audio goes | Stays on your device: the engine runs in your browser | You upload your tracks to RoEx; its page says it never trains its models on your uploads |
Prices as shown on RoEx Automix's pricing page on 27 October 2026 to a visitor in Spain (euro, shown with the annual toggle on; the currency can change with your location). Sources at the end.
Where RoEx is the better choice
- You have a multitrack session and want automatic balancing of the tracks, not just a master on the stereo mix.
- You want processed stems and DAW export (Ableton Live, DAWproject) in the same subscription.
- You want a cleanup and "mix insights" feedback step on your tracks before mastering.
Where OBRA is the better choice
- Your mix is finished and you only need it mastered: two songs a day are free and download without a watermark.
- You have a vocal and a beat, nothing else: Vocal + beat lines them up, cleans and levels the vocal, gives it space and masters the result.
- You do not want an account or a per-download price on every file.
- You prefer your audio to stay on your device while it is processed.
Mix and master, side by side
The honest overlap is "I have a mix problem and a master problem". RoEx's answer is automation on the whole session. OBRA's answers are: Vocal + beat for the common rap and singer case, the BRAVO web DAW for a small multitrack mix, and ULTRA when you want an engineer to listen. If you try more than one, keep the original and compare at matched loudness.
If you want a person to do it
Every service on this page is automatic. If the mix itself is the problem (a muddy low end, a vocal that sits wrong), a master cannot fix it, and a person can. OBRA ULTRA sends your tracks to an OBRA engineer who mixes and masters your song and sends back a WAV and a written note, $19 / €19 / £19 per round, back within 72 hours. Spots are limited each week.
Frequently asked questions
How much does RoEx Automix cost?
On 27 October 2026 its pricing page showed Starter with unlimited free previews and €6.99 per download, and Pro at €11.67 a month billed annually at €139.99 with unlimited downloads. Pro removes the audio watermark that free downloads carry.
Is there a free alternative to RoEx Automix?
For mastering a finished mix, yes: OBRA masters two songs a day free with no account. For a voice over a beat, OBRA's Vocal + beat is free to listen and $5 / €5 / £5 to download. For a full multitrack automatic mix, RoEx remains a stronger fit.
Does RoEx train its models on my music?
Its pricing page says it never trains its models on your uploads and that you keep every right to your work.
Can I get a human to mix and master instead?
Yes. OBRA ULTRA sends your tracks to an OBRA engineer who mixes and masters them and writes you a note, $19 / €19 / £19 per round.
How do I compare two masters fairly?
Match their loudness first (louder always sounds better for a few seconds), then listen to the chorus and the quietest part on headphones and on a phone speaker. Check the true peak of the files you download: −1 dBTP or lower for streaming. OBRA matches the loudness for you when you compare its three masters with your original.