30-Sep-2014, 21:27
I think moving the speakers is only one possibly less important part, since youre not changing the room node/ echo characteristics.
Maybe the position of he mic in relation to 1) the room nodes 2) the speakers 3) the combined room & speaker reflections is the problem?
It should be easy enough to run a test
a) original placement
b) original placement with loads of wall damping, blankets hung from walls etc
that should tell you something
but to be honest, it looks like a hard reflection problem so I think you're stuck with first doing some room/furnishing treatment. (is it a boxy room/lots of reflective surfaces or is a room thats quite open-plan/ heavily damped ?)
the website I linked to suggests that this effect is linked to disruptive time delays etc. Since its a closed-loop system when performing REW measurements, I wonder if using different cable types is simply introducing different time delay at the speakers (due to different amp path), so REW sees a different time bias. We're only talking parts of a millisecond: This wouldn't affect sound-quality when listening normally, but might be important in a closed-loop test configuration where the software is both generating signals and simultaneously checking the response (the linked website shows there is a relationship between delay, distance, phase etc).
Maybe the position of he mic in relation to 1) the room nodes 2) the speakers 3) the combined room & speaker reflections is the problem?
It should be easy enough to run a test
a) original placement
b) original placement with loads of wall damping, blankets hung from walls etc
that should tell you something
but to be honest, it looks like a hard reflection problem so I think you're stuck with first doing some room/furnishing treatment. (is it a boxy room/lots of reflective surfaces or is a room thats quite open-plan/ heavily damped ?)
the website I linked to suggests that this effect is linked to disruptive time delays etc. Since its a closed-loop system when performing REW measurements, I wonder if using different cable types is simply introducing different time delay at the speakers (due to different amp path), so REW sees a different time bias. We're only talking parts of a millisecond: This wouldn't affect sound-quality when listening normally, but might be important in a closed-loop test configuration where the software is both generating signals and simultaneously checking the response (the linked website shows there is a relationship between delay, distance, phase etc).
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Aurender X100, Audiophilleo, Devialet 200, Verity Audio Parsifal Ovation Monitors
Leiden, the Netherlands
Aurender X100, Audiophilleo, Devialet 200, Verity Audio Parsifal Ovation Monitors
Leiden, the Netherlands
