I recently purchased an Onkyo 5 DVD changer (DVCP-500). Now, when audio is run through my JVC RX884-V receiver, via the optical cable, the audio cuts out once for about 3 seconds after about 1/2 hour of use. After this happens, the sound quality changes, and voices and such becomed "gargled". Also, audio doesn't come on immediately when starting a new scene, when a new scene is selected. The receiver is an early '99 model. I was told that the problem may be that the receiver may need a software upgrade, and that many newer DVD players don't always work properly with "older" equipment. The receiver has worked flawlessly since purchased, especially with my previous DVD players. I know it's not the DVD player; this is the second new unit I've tried. Any help is appreciated!