saimox Player
Hear where the sound is
Free · Designed for iPad. Not verified for macOS.
Play object-based spatial audio as it was mixed. Binaural over headphones, head tracking, and a live view of where every object sits.
saimox Player plays spatial audio the way it was mixed — every object in its own place, moving through the room over time.
WHAT IT PLAYS
· SMX packages (.smxd) — streamed from an address or stored on your device
· Multichannel files up to 9.1.6 and 7.1.4 — WAV, AIFF, multichannel PCM
· Ordinary files too — MP3, WAV, AIFF, M4A
Multichannel files are folded to your headphones through the same HRTF path as an object mix. No downmix to stereo first.
Tap an .smxd or a playlist anywhere — Files, Mail, AirDrop — and it opens here.
SEE THE ROOM
The space monitor shows every object where it actually is, moving as the piece plays. Turn it, zoom, or step inside: in head view the camera sits where you sit, and with head tracking the picture turns as you do.
Connect a TV or projector and it fills the screen on its own. The phone stays playable and the sound stays wherever you put it, so the picture can go to a projector while the audio goes to a PA. There is no switch to find — it happens by itself.
MEASURED, NOT GUESSED
Loudness, peak, peak-to-loudness and loudness range for every piece, measured to BS.1770-4 and EBU R128. Set a playback target and pieces are brought to it — quiet ones only as far as their peak allows, so nothing gets squashed by a limiter.
The ceiling uses the peak measured for the output you are actually listening on: headphones and a twelve-channel bed do not have the same headroom, and guessing the difference would be worse than measuring it.
The energy curve shows left, right, front, back, up and down over the whole piece, and doubles as the scrubber.
FIND THINGS AGAIN
Recently played, favourites, recently added, and a row for SMX packages. Open any of them full screen and group by artist. Album, genre, year and credits come from the package and are shown alongside the measurements.
BUILT FOR LISTENING
· Head tracking with compatible headphones
· Playlists you can share as a file — importing one that already exists asks what to do
· Download for offline — no buffering, instant seeking
· Ten colour themes
· Nineteen languages
ABOUT SMX
SMX is an open format for object-based audio. Instead of a finished mix of channels, a file holds the individual sounds and, for each of them, where it is and how it moves.
No ceiling on how many objects a piece may hold. Formats with a fixed maximum — often a hundred and eighteen — force a mix to be reduced before it ships, and no player can undo that reduction later. An SMX package keeps what the mix had. What limits playback is the device, not the format.
That difference is why this app can do what it does. A stereo or surround mix is already decided: the room was baked in when it was made, and no player can undo it. An SMX package still has the pieces, so it can be rendered for whatever you are listening on — two ears, a soundbar, a 9.1.6 room — and it can turn with your head, because the positions are still there to turn.
Movement is described, not sampled. A sound that circles the room is a few lines saying so, not thousands of coordinates per minute. That keeps packages small enough to stream over mobile data and small enough to keep a few hundred on your phone.
And it is meant to be reactive: the format reserves a way for objects to respond to something happening while the piece plays. That part is beginning, not finished.
The format is free to use. No licence to buy, no per-title fee, no certification to pass, nobody to ask. Write an encoder, ship a player, put SMX in your own product — the specification and the reference implementation are open, and that does not change later.
If you make spatial audio yourself, saimox Studio writes SMX and converts to and from all usual delivery formats. And if you build hardware and/or software, libsaimox does the reading, the positions and the rendering for you — ask us. Available at saimox.com.
No accounts. No advertising. No tracking. The app does not phone home.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
NEW
· The library now works in two levels: your playlists first, then the pieces inside one. Each list shows a cover mosaic, its total playing time, and how many of its pieces are SMX packages.
· Playlist covers are built from what is inside: one cover for a single piece, two halves for two, three wedges for three, quarters beyond that.
· Transport controls in the list header — previous, play/pause, stop, next, shuffle. No need to switch to the player to skip a piece.
· Artist page: everything by one artist, gathered across all your lists.
· Search on the home screen, by title or artist, across all lists.
· Paste many addresses at once, one per line.
· Download a playlist from an address. If a list of that name already exists, you choose what happens: replace it, add what is missing, or keep both.
· Long-press a piece to move or copy it to another list, skip, or remove it. Removing from a list and deleting from the device are now separate, and both ask first.
· Measured loudness for each piece, shown in the list.
· In the info tab, each object glows with its level rather than simply showing whether it is active.
FIXED
· Shared playlists were unusable: the exported file pointed at the local copy instead of the original address.
· A piece could play twice, slightly offset, after repeating a list.
· Playing a remote piece downloaded it again every time, filling storage and re-using mobile data.
· The keyboard could not be dismissed in the address field.
· The play indicator did not change while a streamed piece was playing.
· A piece fetched from an address was labelled as a local file.
The developer, Desteba Productions, S.L., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DESTEBA PRODUCTIONS SL.
- Size
- 3.3 MB
- Category
- Music
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, Catalan, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Ukrainian
- Age Rating
4+
- 4+
- Copyright
- © 2025-2026 Desteba Productions, S.L.