A Radio Orb????

Suppose i have 4 skyboxes - each at different elevations. I want to play a different music genera on each level.

Sort of like the security orb that's out there -

I want a radio orb. Is there such a thing in sl?

If they are over different parcels, sure. If they are ONLY at different altitudes, you can set a media stream on a per-avatar basis (see http://www.lslwiki.net/lslwiki/wakka.php?wakka=llParcelMediaCommandList and the PARCEL_MEDIA_COMMAND_AGENT flag), but not the music stream, and not per area; only per avatar. I'm not sure if you can use the media URL for a pure audio stream.

i wanted same parcel - but different streams at different altitude ranges

Using a sensor and see what height an avatar is at and using the per avatar setting is the only way to do it.

How does this work? Does it mean i can set my land so i hear a blues channel and my friend hears classical? I've had a quick look at both wiki entries and don't quite understand what it means.

You need to use a script to do the per-avatar media. Call the "llParcelMediaCommandList" function, with a command to set a specific avatar, and a command to set the URL. Here's the info:

http://www.lslwiki.net/lslwiki/wakka.php?wakka=llParcelMediaCommandList

Yes, I understand that, but does this mean that I could have a set-up whereby, for example, a script grabs my uuid when I touch a prim, offers me a llDialog menu and plays me the url i select, and then, when my friend touches the same prim and selects a different movie, we end up watching different movies on the same prim at the same time?

Yes, I believe that is quite possible. Of course, you are also free to have your script logic make sure it plays the same URL for all avatars, or for groups of avatars (for example, all those within a certain range of altitude).

I think the downside of that, if it's a movie, is that you can't play the movie at the same time, so you both see the same image. I'm not sure about that, but believe that is one of the "features" of the media call.

You can deliberately Stop and Play the movie at specific times using the parcel media command list, but it only affects users within the parcel, and users can still override it using the media control buttons on their own client.

Depends on what kind of URL it is. If it points at a static file, users will see it totally unsynchronized; it will depend on when each of them starts it. If it is a true live stream, they'll all see it at (approximately) the same time. There might be a small difference in the time each client takes to buffer data and such.

Thanks, guys.. I want to have a play with this but first I wanted to have an idea what it should do, so I know whether I've managed to get it to work or not.