VirtualDub help - Dialogs: Audio volume
Processing: Main UI Editing Filtering Rendering/saving Artifacts The pipeline Direct mode Display panes Frameserver Video filter reference Video shader reference Video capture Hardware setup Driver selection Audio setup Pipeline Filtering Info panel Multi-segment mode Timing dialog Performance Troubleshooting Dialogs: Video filters Video frame rate control Video color depth Video range Video compression Audio filters Audio interleaving Audio compression Audio conversion Audio volume Capture settings Preferences On a crash... | Permits volume adjustments to audio, to make the audio louder or softer.
Note | VirtualDub hard clips when amplifying audio, so boosting the volume too much will result in distortion.
Note | It is easier to make soft audio louder than to make loud audio softer -- if the source audio was so loud that it clipped during recording, introducing distortion, reducing volume after the fact won't remove the distortion. On the other hand, amplifying soft audio also amplifies quantization noise, which is particularly bad with 8-bit source. Try not to adjust volume more than you need to; it is better to record audio at the right volume in the first place.