Poor Audio Quality on DVD

grassercj · Post by **grassercj** » Mon Feb 28, 2005 6:55 pm

I am capturing video from a VCR to an MPEG2 file. The audio is very good on the captured file, but when it gets rendered to the vob files, some audio distortion get introduced. It sounds as though there is some crackling noise during some of the louder passages. It is bad enough that I really can't enjoy watching it.

Does anyone have any idea what might have happened during the rendering process to ruin the audio quality? By the way, the video quality is excellent.

BrianCee · Post by **BrianCee** » Mon Feb 28, 2005 7:49 pm

You haven't given us very much information on your settings - what are the sound properties on your disc - is it possible you have the capturing volume set to high - when you captured did you have the "Display Source Volume Panel while capturing" option checked and did the volume lights stay in the green

DVDDoug · Post by **DVDDoug** » Mon Feb 28, 2005 9:32 pm

Try reducing the volume. I had the same problem with DVD Workshop. Somehow the AC3 audio was getting distorted (clipped?) even though the MPEG audio sounded OK. I've started always setting the audio level at 75%, and it's been OK. I have no clue how to set the level just-below clipping.

I don't know exactly how do do this with Video Studio (and I'm at work now, so I can't experiment.)

grassercj · Post by **grassercj** » Tue Mar 01, 2005 3:40 pm

Reducing the line-in volume did eliminate the noise. I had to reduce it to 40% which seemed like a lot, but the noise is gone. I am not aware of the sound recording meters that was mentioned in the second post. Is that a VS capability? I am currently using an old Soundblaster Live! card with its sound mixer. It allows me to adjust the sound level but does not display the level. My old Gateway which used the Voyetra mixer did have this type of meter.

So now I have fairly clean sounding audio, but it is quite low in volume. Has anyone had any experience splitting the audio track and using the VS8 Amplify audio filter to bump the volume back up? I may try that. Thanks for the help.

BrianCee · Post by **BrianCee** » Tue Mar 01, 2005 7:51 pm

To access the recording sound level meters in UVS8 - which are available FOR ANALOGUE CAPTURE ONLY - on the 'Capture' screen click on the options icon (Gear Wheel) then select 'Capture Options' then click to put a dot in the radio button next to "Display Source Volume Panel while capturing" - Now when you click on "Capture Video" a panel will appear having two columns of vertical 'lights' ranging from green to red - indicating each stereo channel volume and a vertical slider to adjust that volume.