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Summit (Archipelago Entertainment) asked a question.

July 21, 2023 at 4:58 AM
LFE Routing in Logic
Hello,
I have been struggling to learn the LFE channel w/ my Atmos sessions. Currently within my session, I have sent nothing to the LFE channel, yet in the Renderer, the LFE channel is pretty hot! When I mute the kick drum and bass track, the LFE channel is very minimal.

My Atmos mixes are bass heavy... I keep turning down the bass tracks to find that happy medium with the LFE metering in the renderer, but I am loosing the feel and energy of the bass.

Any help would be greatly appreciated. Thanks for your time..

  • AdamP (Dolby Labs)

    Hi,

    Check the Renderer Preferences monitoring section. Looks like you have the internal Renderer Speaker Bass Management turned on. Set the frequency to "Off" or modify the frequency as appropriate. If your monitoring system has bass management engaged the Renderer bass management function should not be used as well.

    Thanks,
    Adam

  • Summit (Archipelago Entertainment)

    Adam! Thank you for taking the time to respond.
    Wow, that resolved it. I am laughing and kicking myself that one click has been bewildering me for months... Now I can do all the proper LFE Aux Sends, etc, and have full on control.
    Just one click..

    So just to know for future reference, is Renderer Speaker Bass Management "activating" frequencies whatever HZ it was previously set to?

  • AdamP (Dolby Labs)

    Hi, I'm not sure what you mean by activating. Bass management redirects speaker low frequency content below to the subwoofer output. It meters on the LFE output but is not part of the LFE channel. Bed and Objects are full range. However many loudspeakers are not. Bass management is used to provide full range to signal that cannot be properly reproduced but loudspeakers. In many studios the surrounds and overheads many be smaller speakers so bass management is used. As noted many monitor control systems have bass management onboard and can even bass manage individual speakers based on their specification and the acoustics in the studio. If a monitor control system if being used with bass management than the Renderer bass management should be off. Keep in mind that most speaker playback systems have bass management. It is best not to overly use the LFE as low frequency content will be redirected to the subwoofer in most cases. Also remember that the LFE is discarded in any downmix to stereo.

    Hope this helps,

    Adam
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