linuxaudio.org

On Fri, Mar 15, 2013 at 02:34:11PM +0000, Andrew C wrote:
> No question is a stupid question, as they say, so I might as well ask.

quoted text
> What kind of external audio hardware/JACK trickery would I need to

> send a synth running on my laptop through a seperate output channel on

> an audio interface with multiple ins/outs, send it, let's say, through

> some outboard effects, and then back into the laptop as a seperate

> input?

As others have already pointed out, no trickery is required.

Connecting things via Jack is similar to connecting HW with

cables. If you want to listen to the result in stereo then

you need at least three outputs and one input, if mono is OK

then a normal stereo card will do the job. 
Regarding the delay, this could be problem, not matter at all,

or even be a good thing. It all depends on what the external

effect is doing. If it is a reverb and does not include the

dry sound then the delay won't matter. If it is a reverb and

it does contain the dry sound then there's no reason to mix it.

In other cases, if the return signal from the effect is 'similar'

to the original and the delay does create a problem, then you

need to compensate for it *exactly*, not just the nominal value

as shown by Jack, but the exact one that jack-delay will tell

you. A small error could have a worse effect than a big one,

or no compensation at all.
Ciao,
--

FA
A world of exhaustive, reliable metadata would be an utopia.

It's also a pipe-dream, founded on self-delusion, nerd hubris

and hysterically inflated market opportunities. (Cory Doctorow)
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