|
Digital bass management works in the following manner on my receiver (I believe it works similarly with other brands, but there could be variations).
I set all speakers to LARGE in the player, with SUB set on. I leave all speaker distance settings equal (they don't apply to SACD in most cases anyway, but they normally apply to DVD-A) in the player. With these settings, the player doesn't do any bass management or time alignment. (My player is capable of doing bass management and time alignment with DVD-A, with a fixed 100hz crossover with a 12dB/24dB slope, and doing bass management (no time alignment) with SACD, with a fixed 80hz crossover with a 6dB/12dB slope). My receiver takes the multichannel signal, does an analogue to digital conversion and applies the same bass management and time alignment settings that I've selected for Dolby Digital and DTS--which in my receiver is variable from 40hz to 150hz at a 12/24 slope. The receiver does NOT apply the speaker level settings (set by test tone) for the multichannel inputs, so I have to set those levels in the player.
Some people have their speakers all equidistant, so could rely on the player or an ICBM from Outlaw Audio for bass management, some don't care about speaker distance and some don't like the extra processing involved with digital bass management. I think the flexibility of the digital BM/TA far outweighs any potential signal degradation owing to the A/D/A.
Never try to teach a pig to sing. It wastes time, and it annoys the pig.
|