- APT ProLink systems: boot up order is important to these older systems. From all-boxes-off, they should be booted in the following order: Audio section, wait for the VU meters to turn off, NT-1s (if off)—wait for them to stabilize into a slow-blink pattern, then the Pro Link.
- If you’re running version 1.11 software, and have a difficult time initializing the b1 positions to a Ready condition, you can force a Ready by hitting dial, enter, esc in quick succession. If you’re running 1.14 software, turn the ProLink off, leave it off for ~3 minutes, and then turn back on.
- One side is receiving a full-scale squeal: check that time code settings match on both sides of the connection.
- No audio is passing although ProLink’s display looks stable: check that both sides are in the same audio mode (either stereo or dual destination).
- Check that the “algorithm” and “audio mode” settings match on both units.
- In standard aptx-16 mode, make sure the autosync parameter is set to “OFF”.
- For SMPTE enabled sessions, make sure both units are set to “AUX R / TC Left” in the embedded data section, and that timecode is enabled and Normal.