I own a pmd670 and it’s been great. I’ve recorded everything from voice to screamming race cars.
I’m not sure what’s causing your problem. A couple things to check out: Try a couple of different mics to rule out that as a problem. I’m not at the office so I can’t look at the unit and tell you specifically how to do this, but make sure your sample rate is set properly. There are a lot of choices and if it’s set up with low sample and bit rate you would hear more noise. Again, I’m not sure if you can switch off the phantom power, but check to make sure it’s on if you’re using a phantom-powered mic.
Besides all the settings in the Preset Menu there are a bunch of switches hidden under a panel in the upper right corner of the recorder that’s held on by two screws. When you take off the cover you’ll see the labels. There’s an input pad control under there, If it’s set to -20 you might be hearing noise because you’re increasing the gain to compensate for the much lower signal going into the unit.
That’s all I can think of at the moment. Hope it helps.
John
Dual 2.5 G5 4 gigs RAM OS 10.4.3 QT7.0.3
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FCP Studio 5
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ATTO UL4D driver 3.50
AJA IO driver 2.1 firmware v23-28
SonicStudio HD DAW, Yamaha DM1000, Genelec Monitors