Waveform displacement

Aud 2.0.2; Windows 7 32-bit, .exe installer. When recording with a Logitech h150 headset (and with another headset/mic, too), the audio waveform is displaced .4db above the centerline of the lower waveform window and .2db above the centerline of the upper waveform window. This doesn’t happen when recording music off a CD or music I have stored on my computer. Why is this? Also, even with the mic input at maximum, the volume recorded is very, very low and the ‘amplify’ feature has to increase the volume by 12-15 db; it’s then, of course, very ‘hissy’ and just doesn’t sound very good. Any ideas?

That’s DC Offset. Both of those could be caused by messed up USB services in your laptop. It is a laptop, right? USB microphones and equipment are slaves to the services provided at the USB connector. In effect, half a USB microphone is inside the computer and half outside. If the computer drops the ball, the microphone sound can appear to fall apart and sound bad, when in fact, the mic is fine. The computer is hosed.

You can try a different computer and I bet the errors go away.

You can’t run a USB microphone/headset through cable extensions or through hubs with other equipment. Doesn’t work.

You can force this to work by running the headset through a wall-powered USB hub and then on to the computer. The USB services then come from the hub and not the computer. You can’t use the hub for anything else. Just the headset. You can use this trick to extend the USB cable correctly, too. You get 12 feet. 6 from the computer to the hub and another 6 from the hub to the headset.


Effect > Normalize > [X] Remove DC Offset
De-select everything else unless you want to use the other tools.


Koz, it’s not a laptop and it’s not a USB microphone. A Gateway desk top with Windows7 and a conventional (1/8") phone/mic jack.

So have you tried Remove DC offset for the affected tracks?

Have you opened Windows Sound yet? Right-click over the speaker icon by the system clock, then choose “Recording Devices”. Right-click over the mic input then choose “Properties”. Then click the “Levels” tab and adjust the input slider. There may also be a mic boost checkbox or slider you want to use (the mic boost may be behind an “Advanced” button).

Also look at the “Effects” or “Enhancements” tab in the mic properties - there is often a DC offset correction feature there that you can try that may prevent the offset occurring.

Be aware you can’t expect much from the onboard sound device. You shouldn’t be making professional songs with it.


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