5.1 Surround + Stereo Broadcast Delivery — Step by Step

Delivering audio for broadcast television requires more than just a good mix. The final file needs to meet very specific technical requirements — channel layout, file format, sample rate, and bit depth — or it will fail quality control. This guide walks through the complete process of preparing a broadcast-ready 5.1 + stereo delivery.

8-Channel-Audio-Broadcast-File

Step 1: Understand the delivery spec

Before you start, review the delivery requirements from the broadcaster or distributor. In Canada, most broadcast audio deliveries follow some guidelines, which commonly call for:

  • File format: WAV (PCM, 8 channels)
  • Sample rate: 48kHz
  • Bit depth: 24-bit
  • Channel layout:

    • Channels 1–6: 5.1 surround (L, R, C, LFE, Ls, Rs)
    • Channels 7–8: Stereo downmix

Always confirm with the specific broadcaster — specs can vary.

Step 2: Export your mixes

From your DAW, export two files:

  1. Your 5.1 surround mix — a 6-channel WAV, 48kHz, 24-bit
  2. Your stereo mix — a 2-channel WAV, 48kHz, 24-bit

Both files should be exactly the same duration. If they differ by even a few frames, the delivery will likely fail QC.

Step 3: Validate your files

Before merging, confirm both files meet the spec:

  • Sample rate: 48000 Hz ✓
  • Bit depth: 24-bit ✓
  • Channel count: 6 (5.1) and 2 (stereo) ✓
  • Duration: identical ✓

Step 4: Merge into an 8-channel WAV

Open Wave Merge. Drag your 5.1 file into the first slot and your stereo file into the second slot. Select Scenario 1 (5.1 + Stereo). The app validates both files automatically and confirms they are compatible.

Click Merge. Wave Merge combines the files at the sample level — no re-encoding, no quality loss — and outputs a single 8-channel WAV.

Step 5: Verify the output

Open the output file in a media analysis tool (MediaInfo is free) and confirm:

  • 8 channels ✓
  • 48kHz ✓
  • 24-bit ✓
  • Correct duration ✓

This is the file that goes to the broadcaster.

Broadcast-delevery-file-checklist

Conclusion

Broadcasting a mixed deliverable doesn’t need to involve complex DAW routing. Wave Merge handles the channel layout automatically with built-in validation, so you spend less time on technical setup and more time on the creative work. Free 14-day trial available for Windows and macOS.