I believe the aspect ratio problem happens because the device sending the HDMI output, might have the wrong aspect ratio setup inside of it. I ran into this problem initially with my HDMI converter, but fixed it by selecting 4:3 and 480i. Any 720p or 1080i setting, was forcing 16:9 output from the device itself (and not the fault of the converter). I verified this with an HDMI monitor, only 480i was properly doing 4:3.
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