Guides / Recording DJ sets, vinyl and instruments
How to record a DJ mix on a Mac with an audio interface
Tested on macOS 26.4.1 (Tahoe), Apple M3 Max, 3 Sept 2026. Updated 2026-09-03.
You record a DJ mix on a Mac by running the mixer's REC OUT or BOOTH OUT into two line inputs of a USB audio interface, then recording that channel pair as one stereo file. The author records a Pioneer DDJ-SZ MASTER OUT into line inputs 3 and 4 of a Focusrite Scarlett 8i6 and captures pair 3-4 at 24-bit. One hour at 24-bit 48 kHz is 0.97 GB.
Which output of the mixer do you record from?
Record from the output that is not feeding the room. On a club mixer that is REC OUT (fixed level, unaffected by the master knob) or BOOTH OUT (its own knob). On a controller it is usually the second MASTER pair: the Pioneer DDJ-SZ has "Master Out x 2 (RCA x 1, XLR x 1)" and a separate 1/4 inch Booth Out, so the XLR pair can feed the speakers while the RCA pair feeds the interface.
The author's chain: DDJ-SZ MASTER OUT (RCA) into the two rear line inputs 3 and 4 of a Focusrite Scarlett 8i6, USB to the Mac. Inputs 3 to 6 on the 8i6 are fixed line inputs with a maximum input level of 18 dBu, so there is no gain knob to misadjust; the level is set at the controller.
Avoid the headphone output and avoid the microphone inputs on the front of an interface: a mic preamp expects millivolts and will clip on a line signal unless it has a proper line switch. If your controller has a USB return channel, that is a second option, covered in recording a Pioneer DDJ controller.
How do you pick the right input channels on the Mac?
Core Audio presents an 8-input interface as one device with eight input channels. Most recorders take channels 1 and 2 by default, which on the 8i6 are the mic preamps, so a mix cabled into 3 and 4 records silence. You need a recorder that lets you choose the pair.
- Plug the interface in before launching the recorder. Check it appears under System Settings > Sound > Input.
- In the recorder, select the interface as the source, then choose channels 3-4 (or whichever pair you cabled).
- Play a track, confirm both channels move. One channel only means a bad cable or a mono adapter; see the one-channel fix.
In AirCheck the device list shows a channel-pair picker for multi-channel devices (Ch 1-2, Ch 3-4, Ch 5-6, Ch 7-8, or all channels). QuickTime and Voice Memos have no such picker, which is the usual reason a Scarlett recording comes out empty.
What level should a DJ mix record at?
The recording must never touch 0 dBFS. Serato's own recording guide says to check that levels are not "going above zero DB in the recording channel (otherwise, it will clip and distort)". With a fixed line input the only control is the mixer's master or booth knob, so set the loudest part of a track first, not the intro.
Practical procedure: play the loudest track you plan on, at the channel gain you actually use, and turn the booth or master knob until the peaks sit around -6 dBFS on your DJ software's master meter, with the input level in System Settings > Sound > Input as a second check. Then leave it. A 24-bit file has enough resolution that this headroom costs nothing you can hear, and you normalize once afterwards. A 16-bit file punishes low levels more, which is one reason to record 24-bit and export 16-bit or MP3 later. If your recording still distorts at sane levels, the problem is upstream: see why a Mac recording sounds clipped.
What format and how much disk space does a mix take?
Record 24-bit PCM at the rate the interface runs, usually 48 kHz or 44.1 kHz. Measured on the author's Mac from 45 real recordings: 24-bit stereo 48 kHz uses 16.5 MB per minute (0.97 GB per hour), 24-bit 44.1 kHz uses 15.1 MB per minute, 16-bit 48 kHz uses 11.0 MB per minute, MP3 320 kbps uses 2.4 MB per minute. The longest continuous take in that library is 2 h 5 min at 24-bit 48 kHz and weighs 2.07 GB.
So a two hour set is roughly 2 GB as a 24-bit master and about 290 MB as an MP3. Keep the master, upload the MP3. Full table in how big is an audio recording per minute.
One more thing that matters at two hours: dropouts. A USB interface can stall when the Mac sleeps its display or a hub renegotiates. AirCheck checks every 2 seconds and, if no audio buffer has arrived for 5 seconds, restarts capture into the same file. Other recorders may stop silently.
Can you record a DJ mix without an interface at all?
Yes, in two cases. If your DJ software runs on the same Mac (rekordbox, Serato DJ Pro, Traktor), its built-in recorder writes the internal mix to disk with no extra hardware; see rekordbox, Serato and Traktor. That recorder captures the software mix, so hardware effects, a microphone plugged into the controller, or a friend's CDJ on the mixer's line channel are missing.
If you use an external mixer or standalone gear (XDJ, CDJs into a DJM), a Mac has no line input of its own. The 3.5 mm jack on current MacBooks is headphone only. That is when you need an interface, and the buying table is in which interface you need.
Test that the audio is coming into the recording program and check the levels aren't going above zero DB in the recording channel
Serato, How to record, edit and promote your mixes
Ways to get a DJ mix into a Mac
| Method | Extra hardware | Captures hardware FX and mic | Channel pair choice needed | Cost |
|---|---|---|---|---|
| DJ software's own recorder (rekordbox, Serato, Traktor) | None | No | No | Included |
| Controller USB return channel | None (controller is the interface) | Yes | Sometimes | Included |
| Mixer REC/BOOTH out into a 2-input interface | Scarlett 2i2 4th Gen, $224.99 | Yes | No (inputs 1-2) | $224.99 |
| Mixer REC/BOOTH out into a multi-input interface | Scarlett 8i6 3rd Gen, $309.99 | Yes | Yes (e.g. 3-4) | $309.99 |
Interface prices from us.focusrite.com, Sept 2026.
Where AirCheck fits
AirCheck ($39 one-off, macOS 14 or newer) is built for the interface route: it lists every Core Audio input, shows a channel-pair picker for multi-channel devices such as the Scarlett 8i6 (the author records pair 3-4), captures 24-bit at the device's rate, and exports WAV or MP3 320 kbps when the take stops. Its watchdog restarts a stalled USB capture into the same file, which matters over a two hour set. It has no editing, so trim the start and end in any editor.
When you do not need it: If you mix inside rekordbox, Serato or Traktor on the same Mac and use no external mic or hardware, the software's built-in REC panel is enough. If you need to mix a mic with the set into one file, Audio Hijack ($69) does that and AirCheck does not.
AirCheck records what your Mac plays, or any input, to one file. $39 once.
macOS 14 or newer. One-off payment. Fourteen-day refund, no questions asked.
Questions people ask
How do you record your DJ set audio?
Take a line-level output the audience does not depend on (REC OUT, BOOTH OUT or a spare MASTER pair), cable it into two line inputs on a USB interface, select that input pair in a recorder on the Mac and record 24-bit PCM. Normalize and convert to MP3 afterwards.
Can I plug the mixer straight into the Mac's headphone jack?
No. The 3.5 mm port on current MacBooks is an output. A USB audio interface with line inputs, or a controller that sends its mix back over USB, is the only way to get a line signal into a Mac.
Should I record the DJ mix at 44.1 or 48 kHz?
Either is fine. Record at the rate your interface or DJ software already runs at to avoid resampling. 48 kHz costs about 10 percent more disk than 44.1 kHz (16.5 vs 15.1 MB per minute at 24-bit). See 44.1 vs 48 kHz.
Why is my recording empty when the interface is selected?
The recorder is reading channels 1 and 2 while the mix is on 3 and 4, or the interface's monitor mix is muted. Choose the channel pair you cabled, and confirm the level in System Settings > Sound > Input.
Sources
- Pioneer DJ: DDJ-SZ announcement (Master Out x 2, RCA and XLR; Booth Out)
- Focusrite: Scarlett 8i6 3rd Gen (fixed line inputs 3-6, 18 dBu max, price)
- Focusrite: Scarlett 2i2 4th Gen (inputs, price)
- Serato: How to record, edit and promote your mixes
Related guides
- What audio interface do you need to record a DJ set on a Mac?
- How to record a Pioneer DDJ controller on a Mac
- How to record Serato DJ Pro on a Mac
- How to record rekordbox on a Mac, and where the recordings go
- How to record a Traktor mix on a Mac
- How to record vinyl to a Mac
- Recording DJ sets, vinyl and instruments: all guides
- Every guide, by topic