[LAD] JACK Graph Internal Latency? (was Re: A small article ...)

Paul Davis paul at linuxaudiosystems.com
Thu Apr 29 03:41:51 UTC 2010

On Wed, Apr 28, 2010 at 10:45 PM, michael noble <looplog at gmail.com> wrote:

> A/D -> Rakarrack -> Jackrack -> Ardour -> D/A

this is not the diagram that people are referring to. latency is an issue
when you have:

   A/D -> Ardour -> Rakarrack -> Ardour -> D/A

i.e. Rakarrack as an insert for an ardour track or bus.

would have no less than four multiples of the internal JACK latency. This
> would quickly become unworkable in more complex JACK graphs (for example
> asymmetrical graphs would have signal chains running with different internal
> latencies). This would make having application interconnects a pointless
> exercise in frustration for the most part. And actually, from experience,
> this is not what seems to happen at all.

its not a pointless exercise in frustration because this kind of
connectivity (A feeds B which feeds A) is useful but not as common as the
more simple (A feeds B feeds C).

there have been some suggestions to allow/encourage applications to have
multiple clients precisely to permit the A->B->A ("insert") processing to
work with no extra latency.
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