I guess - if anyone - Geoff Martin should know.....he is the one, who added this feature to the BSys4 sound options.

MM

I don't know if there's a list - but many/most/all of the Telarc and Chesky multichannel discs from the "old days" had this feature.

Telarc's 1812 Overture on SACD is one example.

Note that BIS multichannel discs were released in 5.0 - so there was nothing on the LFE channel.

If you do a search for something like "multichannel lfe height" then you'll find old pages where people complain about this - sometimes with examples.

Cheers
-g

Indeed, MM. I checked on his site and couldn't find any test tracks for it.

Thanks, Geoff!

I have a follow-up question if you don't mind. The Technical Sound Guide indicates that when this feature is used that the LFE channel is redirected to speakers assigned as "Ceiling" as the role. Is this the only role that accepts this channel, or do the other height roles get this channel as well?

Also, Is this the true and only purpose of the "Ceiling" role, or can the "Ceiling" role also be used in setups where the LFE channel is not redirected to "Ceiling"?

That was fast, wasn’t it 🙂

MM

beojeff wrote:

Also, Is this the true and only purpose of the "Ceiling" role, or can the "Ceiling" role also be used in setups where the LFE channel is not redirected to "Ceiling"?

I might have an answer there....even if it not the best and most complete..

In the first case (when redirecting something), you just take advantage of something, that is already in the recording AND the ability of the sound processor to place it where it rightly belongs (because mastered so).

In the other case/cases you use the TrueImage processing to upmix any content to match your given speaker layout (including ceiling speakers).....could be a 2 channel aka stereo recording, but also a 5.1/7.1 recording.

Some liike it native/as is - others like the more engaging sound field, when upmixing.

IMO it also depends on the source....for some sources it't fine, for others the nun-upmixed way might be better.

MM

Millemissen wrote:

beojeff wrote:

Also, Is this the true and only purpose of the "Ceiling" role, or can the "Ceiling" role also be used in setups where the LFE channel is not redirected to "Ceiling"?

I might have an answer there....even if it not the best and most complete..

In the first case (when redirecting something), you just take advantage of something, that is already in the recording AND the ability of the sound processor to place it where it rightly belongs (because mastered so).

In the other case/cases you use the TrueImage processing to upmix any content to match your given speaker layout (including ceiling speakers).....could be a 2 channel aka stereo recording, but also a 5.1/7.1 recording.

Some liike it native/as is - others like the more engaging sound field, when upmixing.

IMO it also depends on the source....for some sources it't fine, for others the nun-upmixed way might be better.

MM

 

Actually, the B&O Technical Sound Guide specifically says that when using LFE for height that the channel is send to a speaker assigned the "Ceiling" role, which is one of the roles available in the speaker role setup.

Geoff:

I ask about the use of the "Ceiling" role because I've been using a single speaker high in the rear assigned the "Ceiling" role while using a single speaker high in the front assigned the "Centre Height" role for movies. Perhaps I've been using the "Ceiling" role incorrectly if it's actually just meant for the LFE height? There's so little documentation about this.

beojeff wrote:

Thanks, Geoff!

I have a follow-up question if you don't mind. The Technical Sound Guide indicates that when this feature is used that the LFE channel is redirected to speakers assigned as "Ceiling" as the role. Is this the only role that accepts this channel, or do the other height roles get this channel as well?

Also, Is this the true and only purpose of the "Ceiling" role, or can the "Ceiling" role also be used in setups where the LFE channel is not redirected to "Ceiling"?

If you turn on the "LFE to Ceiling" function, then the incoming LFE channel will be connected ONLY to the output with the "Ceiling" speaker role. So, if you have a subwoofer that has a Subwoofer Speaker Role, it will not get anything from the LFE input unless the bass management is turned on - and then it's bass managed from the Ceiling output.

The only other time you will get a signal out of an output with a Ceiling Speaker Role is when you are upmixing with TrueImage. In this case, the True Image upmixer is creating a signal designed to be sent to a Ceiling loudspeaker (regardless of the number of channels in the input signal). In this case, if Bass management is turned on, then the ceiling output will also be bass managed to the most capable loudspeakers in the configuration - however, since the signal is derived in an upmixer, that bass is probably already coming out of another output channel anyway... (this depends on the relative phases and amplitudes of the low frequency content in the incoming audio channels... which is complicated.... :-) )

hope this helps.

-g