AV Sync helps you correct Audio Video timing errors by analyzing a test signal - which consists of a short synchonized flash and beep an example of which can be found here.

It includes a Test Signal Generator tool which can be used to correct delay in live applications.

Purchase app for advanced features:

- a selectable list of results (as shown in screenshot 2 above)
- show results in milliseconds PAL or NTSC frames
- more configuration options