AB:X is a stem mixer and mix comparison tool for iPhone. Coming soon.
Levels and EQ are 90% of mixing. Bring stems to your phone, make changes through your car speakers, a Bluetooth speaker or headphones, then return to your DAW with audio and mix notes.
Bounce every stem from the same start point, get the folder onto your iPhone and open it in AB:X.
Change levels and EQ while it plays. Hit Compare to hear the original stems or a saved Version.
Export the mix or the processed stems, plus notes on what you changed. Drop the audio into your session, or redo the moves by hand from the notes.
Mix notesAdjustments from Source
Bring in up to 64 stems from your DAW. Faders run −40 to +20 dB. Solo or mute anything to hear what it’s adding.
Group stems to move their level and EQ together. Each one keeps its own settings too.
Lattice puts every stem on one map, low to high across and quiet to loud going up. It moves the same faders and EQ as the Mixer.
AB:X finds where each sound’s energy sits. Tilt EQ pivots there to trade lows for highs, and Bell EQ boosts or cuts around it. So low and high always mean low and high for that sound.
It’s the stem’s fader. Drag up to turn it up, down to turn it down.
Drag right for more highs and less lows, left for the opposite. The map shows how far it can go.
Drag the selected stem’s tab up or down to boost or cut a Bell EQ at that same spot. Tilt and Bell take two of the stem’s four EQ bands.
Read about LatticeDrag a band on the graph, over the stem’s own spectrum.
Groups get a four-band EQ of their own, on top of each stem’s.
The stem’s name, meter, solo and mute stay above the EQ.
Tap BYPASS to switch the stem’s EQ and level off. Hold it to switch them off just while you hold.
Drag a band on the graph. Here, a 4 dB cut at 2.8 kHz.
The filter type, Q, frequency and gain are right under the graph.
Compare flips between your mix and either the original stems (Source) or a saved Version. REF plays a reference track.
A Version saves the stems, EQ, levels and groups. Compare against one, or load it and keep going from there.
AB:X keeps playing with your iPhone locked, just like a normal music player. Compare from the lock screen, your AirPods or your car’s compatible steering-wheel media buttons.
Bounce the whole mix or just the loop as 24-bit WAV or AAC. Add a PDF with every stem and group setting, the EQ curves and a history of what you changed.
Leave a note while it plays and AB:X pins it to that spot in the song. The notes go in the PDF, so you can find the spot later in your DAW.
Coming to iPhone in December 2026. Free to download.