As a slight aside, I double checked my connections from my previous measurements and determined I had things connected incorrectly. I actually had both the right and left outputs from the soundcard connected directly into the left and right of the receiver. I have since only connected the right channel output to a splitter and then to the receiver. I also did the loop back by connecting the left output to the left input (of the soundcard). So, I think I have everything connected correctly. Oh yeah, and I attached a piece of allthread to my tripod so I could get the mic (SPL meter) off of the couch
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