Sound problem when capturing

[91Archives]

Hello. I have a Dazzle DVC100 capture device. My computer has an onboard Realtek audio device. My capturing software is VirtualDub. When I record, the sound has this high-pitched whine to it and the quality is really poor. If I uninstall my Realtek sound drivers the sound is much better, but still inferior to what it should be. I tried to capture on another computer that also has an onboard Realtek audio device and the sound was the same as my main computer with the Realtek sound drivers uninstalled.

Why does this happen? Is the Realtek sound device incompatible with VirtualDub, the Dazzle capture device, or both? If I bought a good sound card, would it bypass the onboard audio and fix the sound issues? When I capture something I'd like the audio to sound the same as if I was recording it via the line input of my computer.

I did some sound recordings a while ago back when my VCR still worked.

Audio from capture with Realtek sound drivers installed: http://www.filedropper.com/33_9 - Spectrogram view: https://image.ibb.co/hRAow6/33.png
Audio recorded from my computer's line input: http://www.filedropper.com/33line - Spectrogram view: https://image.ibb.co/nx0ow6/33line.png

I don't have a recording of the audio from a capture without the Realtek sound drivers installed but it's between the two.

[Bernix]

Hello,
have you tried this Virtualdub filter mod ? When in capture, but not capturing, audio, here windows mixer, and here enable something like mixing stereo. Doesn't know real translation.
Hope it helps, also compression to Uncompressed.

Bernix

[shekh]

I saw "Dazzle" mentioned in the code as if it needs some workaround. This is just speculation, but check if selecting another audio source with "WDM" in its name makes difference.
There is bigger source list in VDFM (this was a confirmed workaround fr different device/problem, YMMV).

[raffriff42]

Set capture sample rate (device, properties, advanced) to 44100 or 48000.
(some drivers default to 96000 or 192000, which can pick up more noise & interference)
https://encodingtalk.com/threads/hissing-sound-when-using-microphone-solved.2698/
(can't be sure this is your issue from the sample, but it's something to try)