I'm very disapointed with this Kardon product being an avid fan of the past products from the respective company, but this one is off the chart. Playing a DVD movie using either the digital coaxial output or the optical output, the audio plays on and off out of sync. I've pushed the dealying time up and down both on the player and the AVR and it makes no diffrence. That tells me that there is something wrong with decoding device in the player. The DVD31 looks good and offers some great picture rendition. Also the audio rendition is exceptional but I simply can't live up to the fact that it cannot play dvd movies in sync with the audio (or the other way around). Try to avoid this product and lets hope that Harman Kardon will produce a better player in the future.