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lovingdvd wrote:
 1) I read that target response allows selection of 12 or 24dB/octave crossover slopes. What does it default do and where can this be changed? I have a HSU sub - am I correct to use 24dB? |
That is set in the Target Settings pane. The sub low pass would usually be 24dB/octave.
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lovingdvd wrote:
2) Am I correct that the best thing to do is to send the output from the sound card into the receiver, and let it apply its processing and crossover to the signal for my measurements? I then tell REW to use Full Range. Correct? |
Yes, going through the receiver is best. You would tell REW to use Subwoofer when looking at measurements of the sub alone (e.g. disconnect your mains or switch off their amp), bass limited when measuring your main speakers and full range when measuring both sub and mains together.
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lovingdvd wrote:
3) My fronts are set to Small and crossover is 80hz. The fronts are rated down to 32hz so they still put out some good base well below 80hz (because of the sloped cutoff). When I measure this 20-80hz range I want REW to take into account the bass from BOTH the front left AND right channels. Therefore I take it I need to feed both channels from the sound card output into my receiver, right? I ask because surprisingly the docs and diagrams only show hooping up the left OR right. Why would someone want to do this and leave the bass out of one of the fronts from the measurement if they are measuring Full Range? |
You need to measure the various speakers/sub independently first to understand the contribution of each, so that you know which channel to apply filters to (if you have the ability to filter more than the sub), but you also need to measure combinations of speakers as the combined response can differ.
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lovingdvd wrote:
4) Is there any type of test I can perform on my sound card (or any things I can look for in its software/drives) to see if it supports full duplex? For example perhaps there is only a certain setting in the software options under Windows sound controls available for cards that support full duplex? |
Not really, just about every soundcard runs full duplex these days.
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lovingdvd wrote:
5) Will REW run ok with the new Java 6 available from Sun? |
Yes
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lovingdvd wrote:
6) Does anyone know of any higher end A/V receivers that have built in calibration capabilities and editable parametric EQ data specifically for the low bass say 20-100 hz? I could us a new receiver, so if so, it may be easier to just do all the tweaking in the receiver and not have to use the BFD? |
Lexicon and a few other high end brands have those features, but I believe a few other (more realistically priced) processors and receivers have similar features nowadays, try asking on the equipment forum.