D.T.au wrote:
> i have some nice audio apps i would like to use to visualize & analyze my 
> computer's audio output.

Use Jack.

> i managed earlier to create a loopback device, and it worked so-so.
>
> but i have one stubborn application that insists on using the default 
> soundcard's first capture device (sndpeek).
>
> can i re-route sound output back to line in (capture)?

Yes, with a cable.

Your hardware might also support this in its mixer, but this is unlikely.


Regards,
Clemens

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