Recent content by Duc Vu

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    REW graphs do not align with experience

    My sub is svs pb-1000 pro. I'm trying to find out why the sub has port chuffing noise at one position in the room (Position 3) but not at another position (Position 14) after Audyssey calibration. I used REW (ASIO4ALL, LFE channel only) to generate graphs in order to visualize Before vs After...
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    HELP! Sub placement - strange REW graphs?

    Today I also notice my sub makes this kind of rattling noise when it's driven loud. Do you think this is normal? Please wear headphones and increase the volume to hear it better (beside the woofer noise there's a faint rattling noise) https://youtube.com/shorts/kOiLMvY_oRc?feature=share
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    HELP! Sub placement - strange REW graphs?

    @FargateOne @sm52 @John Mulcahy Hey guys. Some good news. This morning I tried plugging the Audyssey mic into the Mic Input on the back panel of my pc and Voila! Calibrated the SPL meter inside REW using the Decibel X app on the iphone. Adjust the avr master volume/sub gain so the SPL...
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    HELP! Sub placement - strange REW graphs?

    I don't understand why I still have to disconnect the left speaker... Since the crossover is set to 250hz, and the sweep plays from 10hz to 250hz, only the sub will emit sound, no?
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    HELP! Sub placement - strange REW graphs?

    This screenshot was taken when the mic was still plugged into the soundblaster. That's why I only enabled the mic input on the soundblaster and disabled the rest. If I plug the mic into the front panel mic port of the pc instead then yes Realtek input will be enabled.
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    HELP! Sub placement - strange REW graphs?

    I thought when I set the crossover in the AVR to 250hz, it meant all the frequencies below 250hz would be sent to the sub instead of the front left, meaning I was effectively measuring the sub? I can felt the rumble from the sub when the measurement sweep was running.
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    HELP! Sub placement - strange REW graphs?

    When I open the spl meter in REW, it shows the level fluctuates, meaning the program detects the mic. However when I, for example, clap near the mic, the meter does not jump up. Same if I play the test tone to check level. No sound seems to be picked up by the mic. So weird. At least with the...
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    HELP! Sub placement - strange REW graphs?

    Unfortunately I don't have any sound card like that. I read people having success by just plugging the mic directly into the mic port on their laptop. Mine is a win 11 desktop pc but when I plug the mic into the mic port on the front panel and use headphone to listen to the mic, sound only...
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    HELP! Sub placement - strange REW graphs?

    Yes I did. Please see the post above. Edit: Probably this sound card is no good for measuring. I found out that if I enable Direct mode on the sound card (which is supposed to bypass the processor entirely), then the mic port does not work. Maybe the mic path of this sound card is routed...
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    HELP! Sub placement - strange REW graphs?

    I already disabled all the processing/enhancement I could find, under both Windows and soundcard settings:
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    HELP! Sub placement - strange REW graphs?

    Sorry what do you mean by improver? Where can I find the settings for that? I checked tutorials on this and they didn't mention anything about the time reference... should I set the distance of my front left speaker back to 0, just like with the sub?
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    HELP! Sub placement - strange REW graphs?

    I use java. Somehow Asio4All does not detect the mic. Sorry what do you mean by highpass filter? Where is the option for that?
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    HELP! Sub placement - strange REW graphs?

    Today I have learned how to use REW, moved my sub around (1 svs pb-1000 pro) and generated the REW file for 12 possible sub placements in my room. Please check the files attached for the REW graphs and my room layout/sub positions. Since I don't own a UMIK-1 mic or any calibrated mic, what I...
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