M-Audio Mobile Pre help needed

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Member Since: Sep 23, 2006

Hi guys first time post, I hope maybe someone can help me out.I'm new to home recording and am trying to get an M-Audio Mobile pre I bought to work.

Set up is:
Dell Inspiron 1000 running XP SP2 (2.19 Ghz 224MB RAM)

Mobile Pre is set up through its control panel to run at medium latency. Firmware Ver 1.03 Driver version

I also installed ASIO4ALL drivers V2.7. Mobile pre is set up with 128 sample buffers in/out. Asio buffer size is 1024 samples.

For testing I'm recording into Cool Edit 2000 or Acoustic Labs Mixer or WIndows sound recorder (just to test it)

Using a Shute PG 57 into Channel 1. Also tested direct guitar input into 1/4" jack.

What happens is the same in each of the three apps. It will record for about 20 seconds normally and then I get this horrible loud scractchy static that drowns out whatever is being recorded. If I stay quiet at that point (no sound input)

I thought it was a buffer overflow kinda thing, which is why I used high samples and buffers, but I'm at a loss as to what the problem is. Any clues as to how I might troubleshoot this?

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Hold 'Em Czar
Since: Dec 30, 2004

Sep 25, 2006 10:04 am

ick! some kinda feedback loop is what is commin' to mind here....check your volume control (start menu > control panel > sounds > volume control) click on the "record" tab in the menu, and make sure the "record what you hear" is unchecked......i'm not sure if that's gonna fix it though, cuz the 'static' you're hearin' sounds like a buncha digital noize, which you gotta troubleshoot where it's commin' from, to start, i'd disconnect the speakers while you record and see if that stops it, if so, we can go from there.

gosh this is a wierd issue though.

also, make sure you're only using ONE driver at a time, they could all be 'fighting' eachother, so uninstall every driver except one, then if it don't work, uninstall it, then install another etc.

Prince CZAR-ming
Since: Apr 08, 2004

Sep 25, 2006 12:12 pm

224m ram is pretty small. maybe the PC is getting too taxed out with moving pages around, and that's the static you hear.

If the playback gets halted, or hung up, it can sound like that.

I'd look into removing as much programs from memory I could. Plus, I'd scale down the sample rate, and possible try 16bit, if you're using 24.

Also, try WDM drivers, if you can. Possible MME as well, though it may be greater latency. WDM may be the solution though.

Try to find a common ground, where it all works, and then build back up from there.

Hold 'Em Czar
Since: Dec 30, 2004

Sep 25, 2006 05:32 pm

good call pat, i'm surprized i didn't catch that.....defiantely sounds like a ram issue, get more! you should be able to do a few tracks though with no problem....you can play with the buffers, i'd set it to 8, 16, 32, 64, 128, 256, 512, 1024 etc....i spent about an hour 'tuning' my system like this, eventually you'll find a sweet spot....a quick workaround is to set a loop up (i usually do a verse or chorus)...do a 5 or 10 second loop and if it plays fine, this means ram isa whatcha need m'friend.

Since: Sep 23, 2006

Sep 26, 2006 07:32 am

Thzanks for the suggestions, I'll work on these to see if I can narrow it down.

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