DVD Rattle...what is it?

[Anita]

Sorry for not being concise. Its my home dvd player - not computer. Only a few of my dvds in a too-large a collection do this; some only make that buzz sound during certain parts of play and not throughout. Like only 3 minutes playtime or longer. I will check for warpage. Thanks!

[Triathlete]

The answer to your question is quite simple...



...your load resistance through the potentiometer in your pre amplification section has not been appropriately minimized.


In other words you need to turn up the volume!

[VXR]

some only make that buzz sound during certain parts of play and not throughout. Like only 3 minutes playtime or longer. I will check for warpage. Thanks!

I would say it is the player itself since it is intermittent. I think the noise would be more constant if the dvd was warped

I have had more than one laptop do this with certain disks

[mdwyer]

[QUOTE=Anita;217826]

• Only a few of my dvds do this
• during certain parts of play

DVD disks are played with constant linear velocity. Or in other words, they spin the disk faster when they're reading the outside tracks and slow them down when they're reading the middle. This explains why it only happens during some times.

The other point has already been explained by everyone else. When your tires are unbalanced or warped, your steering wheel vibrates. Similarly, when your DVDs are unbalanced, they vibrate while spinning. Some of your disks must be better balanced than others. First, make sure there aren't any stickers on the disk that would throw it out of balance. Other than that, I don't think there's much more you can do.

[Triathlete]

Other than that, I don't think there's much more you can do.

Refer to my post above.