[linux-audio-user] JACK configuration: Preventing system lockups

[Wolfgang Woehl]

Dave Phillips <dlphillips at woh.rr.com>:
> Btw, additions and corrections are welcome.

Hi Dave, maybe add the -I and -O options. They let you specify "systemic 
latency". When you route audio out of JACK's realm to process somewhere 
out there (physical signal processors or "the net" even) and then route 
back into JACK you get latency to deal with. An example for where that 
matters is Ardour which has to align outgoing and incoming audio.

Real-world example is my ad/da that is connected via adat (in/out 
latency of 34 frames) and is used to bus audio through a hardware 
dynamics processor (in/out latency of 36 frames and then take it back 
into an Ardour signal path. With "-I 70" and "-O 70" Ardour's alignment 
is sample-perfect.

The net can be audio source (collaborators on the other side of the 
world) or insert (networked ladspa box) in an Ardour signal route. 
Never tried it but -I and -O should give you perfect alignment just as 
well.

Wolfgang