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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.I don't use Perplexity at the moment, so I used ChatGPT. It told me what I already know about looking at these graphs.
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Okay. Signals then, and not THD?
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Okay, but when I do that, what am I looking for? Should I set up a narrow band of Pink Noise say from 20--100Hz and use RTA to look at...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Okay. I'm flummoxed as to what it could be. Four sweeps. Five Seconds apart. No external audible intrusions whatsoever across all four...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Clearly, I need a bit of learning in this area. :reading: Can you help me understand what could cause this degree of variation in the...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.I trimmed it a bit. Maybe it will attach.
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.I guess it just bothers me. That's a >10 dB worsening of the THD in that range, when there was no change between sweeps. No HAVC (I'd...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.You want the Impulse responses?
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.It's not the magnitude so much. It's the variation from sweep to sweep. Look at the first sweep. There's (compared to the next three)...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Hi @John Mulcahy, I hate to keep nagging at this but I'm just confused. Is the UMIK-1 maybe just not a good device for measuring THD...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.John, the level was off. It was a bit higher. Could that explain what I'm seeing here? I'm about to do another run.
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Thanks John. I will check as instructed. What worries me is that there's such a significant appearing difference. Nothing has changed...
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Ttony22 replied to the thread Need some help interpreting unexpected Distortion changes.Oh, that was with my REL Carbon Special sub on. Here are the same before and after with sub off.
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Ttony22 posted the thread Need some help interpreting unexpected Distortion changes in Official REW (Room EQ Wizard) Support Forum.I've had no changes to my system since my last set of "reference" measurements. But after a rather nasty electrical incident I decided...
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