Sox is your friend:

sox -v 2.0

will double the volume, basically.

There's much more to it, of course. But, sox has a great man page.


Linux for blind general discussion writes:
> I would like sometimes to use my pc to amplify audio; my hearing is very porr.
> I would like to just have the mic or line-in amplified and come to my 
> headphones.
> I used to know how to do this but cannot remember.
> Can you suggest the easiest way using command-line command?
> Ubuntu 16.04lts, x86/64 with alsa and many audio programs on there.
> thanks.
> _______________________________________________
> Blinux-list mailing list


Janina Sajka

Linux Foundation Fellow
Executive Chair, Accessibility Workgroup:

The World Wide Web Consortium (W3C), Web Accessibility Initiative (WAI)
Chair, Accessible Platform Architectures

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