I am experiencing a persistent problem with sound input from internal microphone on my ASUS K52F laptop (iCore M350, Ubuntu 10.10). It produces low level Skype input. Is it possible artificially amplify input level, by mean of software/tool?
If you click on the Sound Menu (icon at the top right) > Sound Preferences > Input
There is a slider that allows you amplify the input volume level manually, even beyond 100%.
Also you may want to go into Skype > Options > Sound Devices and deselect "Allow Skype to automatically adjust my mixer levels". Skype is defaulted to change your levels for you.