MobilePre USB Setup and Troubleshooting Thread - Page 3 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #21 of 23 Old 02-18-12, 10:40 AM Thread Starter
pbc
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Re: MobilePre USB Setup and Troubleshooting Thread

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pbc wrote: View Post
Toubleshooting

For some reason, sometimes when you run a sound card calibration, you'll get a really "noisy" result with lines all over the place like in the attached picture.

As far as I can tell, this is possibly the result of a few things:

1. Your cables are all twisted. Try untwisting them.
2. Your AC cable from your laptop is too close to your RCA cables.
3. Your Latency (see post 1) needs to be adjusted higher or lower (note, you have to exit REW to do this).

Sometimes this keeps on persisting, and you may need to reboot. I have no idea why this happens but playing around with the above seems to make it eventually go away.

Now, when actually running measurements, sometimes you'll hear this "noise/warbling" of the tone coming out of your subwoofer. Cancel the measurement, and check all of the above again. Usually it has something to do with the cables in my experience and fiddling with them tends to make the tone go away. Sometimes you just have to keep running measurements a few times and it just suddenly works.

I know, it sounds weird, but that has been my experience (I actually bought a new MobilePre thinking my last one was shot).


Other Items to Check

Download the most recent version of Java ....

http://www.java.com/en/download/index.jsp
Was trying to measure a Paradigm Sub2 Frequency Response last night, and this same phenomena happened when trying to recalibrate the sound card.

Exited REW, increased the latency to 4096, went back in and all was good.

Seems to be the proper "fix" for whatever it is that is happening. At least in my case.
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post #22 of 23 Old 09-20-19, 04:15 AM
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Re: MobilePre USB Setup and Troubleshooting Thread

hi i dont now about interfaces i just got this Mobile pre usb use off of craigslist no manual or install cd i think im set up for the most part but but i have no idea what you guys r talking aboud as for as wht REW is are a sound card calibration please inlightin me please
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post #23 of 23 Old 09-21-19, 07:13 AM
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Re: MobilePre USB Setup and Troubleshooting Thread

You must have found this thread doing a search on the Mobile Pre. Interfaces are typically used to record musical instruments or vocals to a computer.

REW is Room EQ Wizard, a free platform for taking measurements of speakers in the listening environment. It can use an interface and mic to take the measurements.

If you bought your interface to make recordings, you don’t need to worry about REW and sound card calibrations.

Regards,
Wayne



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