Yes and no, it depends on the service.

These services use DRM protection and SB can't sync a DRM protected
signal it needs to be decoded first. Many of the services limit the
number of devices which are allowed to connect to the service, for
example on Rhapsody this is 3 devices.

For various reasons, mainly copy protection, the decoding can only be
done on the hardware...not in the server...so you need to open up one
stream for each player in sync.

Example:

You're playing Rhapsody on SB #1. It's downloading the encrpyted data
from Rhapsody to your player, decoding the stream and playing it back.
Then you choose to sync SB #2. As there is no way that SB #1 can share
the decoded stream with SB #2 directly, it too has to start downloading
and decoding the stream from Rhapsody. When it's doing so, the streams
can be synchronised. Add in SB #3 and the same happens again.

But Rhapsody only allow 3 concurrent connections so a 4th player cannot
connect. Also, if you use Rhapsody directly on a PC you may find you're
limited to 2 devices.

This doesn't just apply to sync, but to playback in general.

The ability sync varies a little from service to service. Some work
fine, some don't work at all, some are limited like Rhapsody is.

Obviously to sync 3 players, you'll also need 3 times the bandwidth on
your internet connection.


-- 
jaffacake

Ben - eco conscious techie and author of Jaffa's Green Blog -
http://www.jaffacake.net
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