Time lags which occur during playback of video and audio may have different causes. In some cases, the cause is hardware-related. For an audio-visual verification of synchronous playback, we provide our customers a test DCP incl. instructions. 

• Suitable test material for your easyDCP Player (+) installation can be provided on request here

It has to be distinguished between two basic video / audio types of time lag:

Offset between picture and sound is constant during playback:

Possible causes:

• Offset of the image and / or sound track of the DCP is not entered correctly.
  Solution: Regenerate DCP with corrected offsets
  
  
• Hardware is configured with incorrect latency.
  Solution: Tho control of the graphics and sound card of a computer varies depending on hardware and operating system. Today's operating systems determine the respective delay and provide the value of this delay as "latency" to the affected programs.
  These values ​​are also available for easyDCP Publisher and easyDCP Player (+).
  It's available for each audio device separate and can be subsequently adjusted within easyDCP programs here: Preference -> Audio -> Latency. 
  
  

Offset between picture and sound changes / grows during playback:

Possible causes:

• The source material does not match the frame rate provided in the DCP (e.g., 23.98 versus 24fps).
  Solution: Regenerate DCP with corrected frame rate.

Note: If you're using easyDCP Creator/+ version 3.6 or higher, it is possible to convert frame rate data with 23,97 fps within 24 fps projects. Please have a look at the following MASTERCLASS FAQ how to adjust the frame rates: MASTERCLASS - Session Five: Automatically convert frame rates