Why is the synchronization signal not strong enough?

The first thing would be to try to increase the mixer synchronization input and output level. The settings in the suggestions below are found in Measurement->Sound Card Settings.

1.

Check that the cables are connected properly.

2.

Check that you have chosen the right audio devices

3.

Check that you have chosen the right sync line

4.

If nothing above helps, try to turn on the check-box:



This will not work on older PC’s with bad performance.