WAV, AIFF, FLAC or MP3: which format should DJs play?

Short answer: play lossless (WAV, AIFF, FLAC or ALAC) when it costs nothing extra, 320 kbps MP3 everywhere else, and never go below 256 kbps. One rule beats the format itself: never turn an MP3 into a WAV, because the missing detail does not come back. Here is what each format loses, costs and weighs, and which gig it fits.

Lossless and lossy, in plain words

A WAV or AIFF file is the full recording, sample by sample, as it left the mastering studio. FLAC and ALAC (Apple Lossless) are the same audio packed like a zip file: smaller on disk, identical when played. That is what lossless means: unpack it and the original comes back, bit for bit.

MP3 and AAC are lossy. The encoder uses a model of human hearing to drop what it predicts you will not notice: quiet details hidden behind louder ones, and the very top of the frequency range. The bitrate (320, 256 or 128 kbps, kilobits per second) says how much data is kept. More bitrate, less thrown away, and once it is gone no converter can rebuild it.

What a 320 kbps MP3 loses, and when you hear it

At 320 kbps the losses are small. At home or in a bar, most people cannot tell a 320 kbps MP3 from the WAV, and most DJs cannot either when they do not know which is which. Where it can show is the top end: cymbals, hi-hats, noise risers and long reverb tails can sound slightly smeared or swishy, and a big club system makes that easier to hear than bookshelf speakers.

What really damages a file is encoding it twice. An MP3 made from another MP3, or from a video rip, stacks two rounds of losses, and that is where the harsh, watery sound comes from. Converting a lossy file to WAV does not help: you get a big file with the same holes, and nobody can tell from the file that it was ever lossy. Keep purchased files as they came and encode only from a lossless source.

256 kbps AAC against 320 kbps MP3

AAC is a newer codec than MP3 and makes better use of each kilobit. Apple has sold iTunes Store downloads as 256 kbps AAC since 2007, and 256 kbps AAC is also the best lossy setting Apple Music, SoundCloud Go+ and Beatport Streaming Professional deliver inside DJ apps. SoundCloud and Algoriddim (djay) both call 256 kbps AAC comparable to a 320 kbps MP3, and that matches what DJs hear: it is fine for any gig. It is the floor, though. Below 256 kbps AAC or 320 kbps MP3 the top end starts to go, and 128 kbps streams are for previewing, not playing.

Does 96 kHz 24-bit sound better in a club?

Two numbers describe an uncompressed file. The sample rate (44.1 kHz on a CD) sets the highest frequency it can hold: half the sample rate, so 22 kHz, already above what adult ears pick up. The bit depth (16-bit on a CD) sets how far the quietest sound can sit below the loudest: about 96 dB, more than any club system reproduces over a crowd. Higher numbers help in the studio, where audio is processed many times. For playback, 44.1 kHz 16-bit is the finished product. A 96 kHz 24-bit WAV is over three times the size and brings nothing you can hear in the booth; the CDJ-3000 converts every file to 96 kHz 32-bit float internally anyway.

Which DJ apps and players read FLAC and ALAC

MP3, AAC, WAV and AIFF play everywhere. FLAC and ALAC are the ones to check (official support pages, October 2026):

If you use Mixxx or Traktor, keep your lossless library as FLAC rather than ALAC. Some older players and controllers do not read FLAC: check the manual of the gear you will meet, or carry a 320 kbps MP3 copy of anything you cannot do without.

How much space each format takes

CD-quality audio is 44,100 samples per second, 16 bits each, two channels: 44,100 x 16 x 2 = 1,411,200 bits per second, about 176 kB per second or 10.6 MB per minute. A 320 kbps MP3 is 320,000 bits per second: 40 kB per second, 2.4 MB per minute. FLAC shrinks a WAV by 30 to 70 percent depending on the music; dense club tracks sit near the low end. For a 6-minute track:

A 1,000-track library fits on a 64 GB stick as FLAC, needs 128 GB as WAV, and about a quarter of that as MP3. That is the real trade: lossless costs space, not sound.

What stores and streaming services deliver

Download stores:

• Beatport sells MP3 at $1.49 (€1.39) for the general catalog, $1.69 (€1.59) for new releases and $2.49 (€2.39) for exclusives, plus a lossless fee of $0.75 (€0.75) per track for WAV or AIFF. An MP3 you already bought can be upgraded later for the difference.
• Bandcamp charges the price the artist set, once, and lets you download in any format, or all of them: MP3 320, MP3 V0, FLAC, ALAC, WAV, AIFF, AAC or Ogg Vorbis. Lossless costs nothing extra.
• Apple iTunes Store sells 256 kbps AAC only. Apple Music lossless (ALAC) is a streaming feature with copy protection, and DJ apps do not load those downloaded files.

Prices checked October 2026.

Streaming inside DJ apps depends on the plan and the app:

Prices checked October 2026. Terms differ by service and country: SoundCloud, for example, allows Go+ and DJ streams for private use only, not club performances.

Which format for which gig

Keep one master copy per track, tagged and analyzed once, and make every other copy from that master.

To hear lossless without paying extra, start with official free downloads: labels and artists often give them away as WAV, and our Free downloads list collects the legit ones, each with a 30-second preview.