[CentOS] Using Pulse Audio--question

Mon Dec 23 01:32:05 UTC 2019
John Pierce <jhn.pierce at gmail.com>

On Sun, Dec 22, 2019 at 5:23 PM David G. Miller <dave at davenjudy.org> wrote:

> I do something similar to what you're trying to do when I digitize my
> vinyl LPs.  I take output from my amp/turntable into my sound card and
> use Audacity to digitize it and write an appropriate sound file.  I also
> monitor the sound using Audacity by telling it to also route the sound
> to my speakers.  The point of all of this is that I think you need a
> piece of software (Audacity is probably overkill) to receive the input
> and play it back via the output.  You don't mention any "playback"
> software.

on many analog sound cards, the output mixer has a 'monitor' channel for
the input mixer, so if you crank up the Line IN on the input mixer, then
turn up the 'monitor' output on the output mixer, you should get
passthrough audio without any software getting involved in moving the sound
in realtime.

this is much less likely to work with a seperate USB audio source, as thats
not directly connected to your output.   ditto it won't work with  USB
speakers or headphones, as they are not directly connected to the source.

-john r pierce
  recycling used bits in santa cruz