Hardware & signal path
Standalone player
A standalone player reads music straight from a USB stick or SD card. The decoding, the display and the cueing all happen inside the player, so nothing about the performance depends on a computer being awake.
In practice
Carry two sticks with identical exports, and format them the way the player’s manual asks.
The second stick is not paranoia — it is the only recovery available when the first one refuses to mount, and it costs nothing to carry. Export from the library software the player expects rather than dragging files across: a folder of MP3s will play, but with no grids, no cues and no playlists, which is most of what you spent the week preparing. Then plug both into the actual player before you leave the house. A stick that mounts on a laptop has proved nothing about whether the deck will read it.
Two sticks
What to carry
Export, not copy
How to write them
Before the gig
When to test on the player
Where these come from: Preparation practice rather than catalog figures — our analysis reads audio, so nothing we store describes how a file was exported or which filesystem it sits on. For what we can measure, see preparing the stick.
Why it matters
The failure modes move. There is no operating system to update mid-set and no cable to knock out, but everything now depends on a stick you prepared days earlier — and a stick that reads at home can still refuse to mount in a booth.
It also changes how you prepare. A laptop lets you fix a missing grid on the spot; a standalone player does not, so beat grids, cues and playlists have to be right before they are exported rather than corrected on the night.
Frequently asked
Do you need a laptop for a standalone player?+
No. That is the definition — the player reads the music from a stick or card and does everything itself. A laptop is only involved earlier, when you prepare and export the library.
Why does my USB not work in the club?+
Usually the filesystem or the export. A stick formatted for a computer rather than for the player will not mount, and a stick filled by dragging files carries no grids, cues or playlists even when it does.
How many tracks should you take?+
Enough to change your mind and few enough to find something. The practical limit is your own search speed on a small screen, not the capacity of the stick.
Related terms
CDJ
A CDJ is the club-standard media player: a jog wheel, a pitch fader, hot cues and a waveform display, playing from a USB stick, an SD card or a laptop. It carries no mixer of its own.
All-in-one system
An all-in-one system puts two or four decks and a mixer in a single chassis and plays from USB with no laptop. It replaces a pair of players plus a separate mixer with one box and one power lead.
USB prep
USB prep is exporting the tracks, grids, cue points and playlists you need onto a drive a club player can read. What is not exported does not exist once you are behind the decks.
Controller
A controller is a jog-wheel-and-mixer surface that drives DJ software on a computer. It sends control messages rather than making playback decisions, and usually carries the soundcard that turns the software’s output back into sound.
Explore: Mixing guides · USB prep · BPM tapper · All DJ terms