More > Media Center 14 (Development Ended)
New speaker DSP in Media Center 14.0.127 [Room Correction]
Matt:
No distance-based attenuation is applied to the subwoofer channel.
But after more consideration and testing, we believe that distance based attenuation should be applied to matched sets (L/R, LS/RS, RR/LR) based on their relative distance to each other instead of relative distance across all speakers.
This change will be in a future build of the program.
mojave:
You are technically correct that no distance based attenuation is applied to the subwoofer channel. However, increasing the distance in the subwoofer channel compared to the mains attenuates the mains. Decreasing the subwoofer distance in relation to the mains does not cause a change in the mains volume. Is this by design?
Matt:
--- Quote from: mojave on March 02, 2010, 05:35:33 pm ---You are technically correct that no distance based attenuation is applied to the subwoofer channel. However, increasing the distance in the subwoofer channel compared to the mains attenuates the mains. Decreasing the subwoofer distance in relation to the mains does not cause a change in the mains volume. Is this by design?
--- End quote ---
Like I mentioned above, a coming build revises this so attenuation is based only on matched channel sets. Phasing still operates based on all the speakers in play, so moving the subwoofer distance could change phasing on other speakers to provide a perfectly phased image at your listening position.
udailey:
I would love to see room correction with a calibrated usb mic.
Most things this would solve are obvious. One that might not be so obvious is subwoofer timing. Matching the speed of the sub to the fullrange speaker. Full range single driver speakers and planars and ESLs are very hard to match with subs because the full range driver is much faster than the sub. What MC could do is to have the computer 'listen' to both sub and full ranger near the crossover frequency and slow the full ranger to flow better with the subwoofer. This would allow much better sub integration into the sound. As it is now very fast speakers are fast because they have very little mass to move. Because they have little mass to move they usually dont create low bass with much SPL so they need a sub but the sub has more mass to move and is slower. When this is the case we can hear the separate speakers. If we could slow down the full ranger near the crossover frequency then the sub would integrate much more seamlessly and we would again hear ONE speaker rather than the 2 or more that are involved for each channel.
Second point.. some subs have a servo correction system in them. Some of these servo correction systems are implemented with a mic rather than other sensors or circuits that guess. MC could act as a subwoofer servo if that mic was continuously in use. Maybe that last one is crazy but it sure would be nice.
Uriah
Matt:
--- Quote from: udailey on March 28, 2011, 09:01:38 am ---mic was continuously in use
--- End quote ---
Good idea.
This would also allow for nice volume-based equalization to adjust for the human hearing curve:
http://en.wikipedia.org/wiki/Equal-loudness_contour
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