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Technical resources

Audio line-up pack

Tone at both line-up conventions, stereo idents, phase and polarity checks, pink noise, a sweep and LTC timecode at 25 and 29.97 fps.

ZIP, 15 WAV files · 36.7 MB · Updated November 2026

Fifteen WAV files at 48 kHz and 24 bits for lining up a desk, an encoder, a recorder or a remote contributor. Every level is stated in the file name, and a README explains what each one is for.

What's in the pack

  • 1 kHz at -18 dBFS (EBU, 0 dBu in UK practice) and at -20 dBFS (SMPTE reference, common on US kit).
  • EBU stereo ident (left drops out every 3 seconds) and a GLITS-style ident (left once, right twice every 4 seconds).
  • Left only and right only, for routing checks.
  • Polarity pulses and pink noise in and out of phase: sum to mono and hear whether a leg is inverted.
  • Uncorrelated pink noise for PA and room checks, a 20 Hz to 20 kHz sweep, and 100 Hz and 10 kHz tones.
  • LTC timecode from 10:00:00:00 at 25 fps and at 29.97 drop-frame.
Watermarked preview of Audio line-up pack

Get the files

ZIP, 15 WAV files · 36.7 MB · free

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Line-up in two minutes

  1. Play the -18 dBFS tone into the desk and set it to read your alignment mark.
  2. Send it on to the encoder and the recorders and check each reads the same.
  3. Play the stereo ident and check the gaps are on the left at every point you can listen.
  4. Play the out-of-phase pink noise into the mono feed: it should almost disappear. If it doesn't, something is summing wrongly.

The levels and loudness targets behind this are on the audio levels and radio mics cheat sheet.

Rather we did the paperwork?

Send the client brief and floorplan to Production Office and get back the kit list, signal flow, crew plan and schedule, checked by a broadcast engineer, with nothing of ours on it.

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