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Dirac Live
Can I use ATMOS with Dirac? What about upfiring speakers vs ceiling speakers?
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ATMOS: Upfiring speakers vs ceiling speakers
Upfiring speakers behave differently than ceiling speakers in Dirac Live (if they have been properly labeled in the device).
The speaker type should be "DOLBY_ATMOS_SPEAKER" for upfiring speakers. This should trigger a pre-emphasis filter being applied on the device to the stimuli played through such a speaker.
The pre-emphasis filter is there to ensure that the special Dolby-patented target curve for such speakers is not "destroyed" by the Dirac Live filter design.
Basically, the pre-emphasis filter will hide the Dolby-filter from our measurements. This doesn't happen in Dirac Live, it happens on the device.
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