Different settings produce different looking Impulse Responses

AustinJerry

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Jun 5, 2017
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216
What settings would cause these two Impulse Response measurements to look different? The first one has jagged lines, the second one doesn't.

Sonnie's Impulse.png


Jerry's Impulse.png
 

John Mulcahy

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That's noise. Have you turned off antialiasing in the View preferences, by the way?
 

AustinJerry

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The impulse showing noise belongs to another user. I'll pass on your comment to see what he says.

In my preferences, I have "Use Anti-aliasing for traces" checked. I can see the difference when the setting is toggled off and on with my impulse response measurements, but I never see noise as bad as the example I posted earlier. Is noise like that an indication of something wrong with the other user's setup?
 

John Mulcahy

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Perhaps an issue with gain settings along the mic path, assuming it wasn't just measured in a very noisy environment.
 

Sonnie

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Hey John... I only see it when I use full bandwidth measurements of 0-22kHz. If I only measure 0-400Hz, I don't see the noise.
 

Sonnie

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StormAudio ISP Elite 24 MK3 Processor
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Intel NUC w/ Roon ROCK
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for media discs)
Front Speakers
RTJ 410
Center Channel Speaker
MartinLogan Focus C-18
Front Wide Speakers
JTR Neosis 110HT
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JTR Neosis 210RT
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JTR Neosis 210RT
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JTR Neosis 110HT-SL
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JTR Neosis 110HT-SL
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JTR Captivator 2400 x6
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VTI Amp Stands for the Monoblocks
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Sony 98X90L
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Lifetime Roon Subscription
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Zero Surge 8R15W-1 | Salamander Synergy Equipment Stand
Checked.. but still getting noise on full range measurements with timing.

25935
 

John Mulcahy

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If you are measuring a subwoofer you don't need to make a full range measurement.
 

Breeman

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Jan 9, 2019
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My subwoofer measurement looks fine with the 5-20kHz setting. Just wiggles in the first "cycle" of the impulse response which I can't explain.
25947
 

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Sonnie

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StormAudio ISP Elite 24 MK3 Processor
Main Amp
McIntosh MC1.25KW Monoblock Amps
Additional Amp
StormAudio PA 16 MK3
Computer Audio
Intel NUC w/ Roon ROCK
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for media discs)
Front Speakers
RTJ 410
Center Channel Speaker
MartinLogan Focus C-18
Front Wide Speakers
JTR Neosis 110HT
Surround Speakers
JTR Neosis 210RT
Surround Back Speakers
JTR Neosis 210RT
Front Height Speakers
JTR Neosis 110HT-SL
Rear Height Speakers
JTR Neosis 110HT-SL
Subwoofers
JTR Captivator 2400 x6
Other Speakers or Equipment
VTI Amp Stands for the Monoblocks
Video Display Device
Sony 98X90L
Remote Control
Universal MX-890
Streaming Equipment
FireCube for movies and Lenova Carbon X1 for Roon
Streaming Subscriptions
Lifetime Roon Subscription
Tidal
qobuz
Netflix
Amazon Prime
Satellite System
Dish Joey 4K
Other Equipment
Zero Surge 8R15W-1 | Salamander Synergy Equipment Stand

Avsaddiction

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Oct 22, 2019
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Hi,
I see your impulse graph has the peak in the negative (-100%) like some of mine.
Does this mean that somehow the signal polarity the speaker receives is reversed, even though the wiring checks OK?
 
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