Audio is Humming on Capture

[johnviz]

I have an AIW 9800Pro. The only problem that I have is when I capture to my Hard Drive from my cable box there is a slight hum in the audio. Most noticeable when there is a little bit of silence in the film.

I do have Adobe Premiere Pro and was wondering if there was a way to remove the hum after capture? Thanks in advance

JohnViz

[nic2k4]

It hums 'cause it doesn't know the words :) Ok, seriously, your humming is probably due to a ground loop. Try grounding the cable box and PC together or plug them into the same surge protector. Also, look at replacing your cables.

To answer your question, I don't know about premiere pro, but as far as I can re-call, the audio facilities in premiere are very limited. Soundforge has filters to take care of that, so does the Nero wave editor. Depending on the format you used to record, you might have to demux the audio to be able to correct it. Then, you'd only need to add the new audio file to the premiere timeline.

[redwudz]

What nic2k4 said. I use Audacity to get rid of hum. But much better to eliminate it first during capture. To filter it out, you also filter out that frequency(s) in your audio. May not make a big difference, but it's sometimes noticeable, especially if the hum is strong and has some harmonics.

[johnviz]

What filter would you use in Soundforge or Adobe Audition to remove that hum?

[lordsmurf]

http://www.digitalfaq.com/dvdguides/restoration/audio/soundforge/soundforge.htm

[johnviz]

I have my computer and DVR cable box now sharing the same surge protector, but still no fix. I also lowered the recording volume, but that hum is still there, especially in periods of silence of the film.

[nic2k4]

I have my computer and DVR cable box now sharing the same surge protector, but still no fix. I also lowered the recording volume, but that hum is still there, especially in periods of silence of the film.

If your DVR box doesn't have a 3 prong plug, try grounding the 2 cases together. If that still doesn't help, try putting the 2 boxes in different locations, together and apart. Also, try better quality and shorter audio cables. Those are the easy steps, beyond that you should try recording from/to something else to isolate the problem to the PC or DVR. Then you would have to try the sound card in a different slot or try a new sound card. If the problem is with the DVR, open it up and check the quality of the solders on the audio connectors, check that the board and case are properly grounded...