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In Reply to: Re: Bass management or LFE low-pass filtering is required if using a sub posted by Dave Kingsland on December 3, 2005 at 10:59:26:
I know, in theory duplicating bass information in the subwoofer may seem to be a stupid idea and as csuzor pointed may lead to "excessive bass".But in reality, frequency response below 80 Hz is very erratic and regardless of how "flat" your speakers or subwoofer is tends to be 6-10 dB below reference, because frequencies below the lowest room excitation mode don't benefit as much from closed room interaction.
So "doubling up" on the low frequencies (below 80-100 Hz) makes up for this "natural" attenuation and may lead to a flatter overall response for the majority of situations. Strange but true.
The only situations where it would not benefit are obsessive compulsives who have tried to correct this themselves in their system setup.
It's an interesting paradox that many sound engineers grapple with - do you optimize the recording for the majority of cases and compensate for playback deficiencies (even if it means it sounds less than ideal for those that do not have these deficiencies) or do you maintain purity and fidelity and know fully well it will not be optimal for the majority of consumers?
Another example is compression. It is well known that a moderate amount of compression improves the subjective impression of a recording, since most systems are unable to fully reproduce the dynamic range of uncompressed music. Yet compression will rob those who *do* have systems capable of reproducing a high dynamic range from truly enjoying full fidelity from those recordings. Tough choice.
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- That's not as bad as you think - Christine Tham 15:08:42 12/03/05 (0)
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