[LAU] [Bulk] Re: [Qtractor-devel] [Fwd: Re: ; ) Was - Re: Session management with NSM]

[Fons Adriaensen]

On Thu, Sep 04, 2014 at 11:34:27PM +0200, Ralf Mardorf wrote:
 
> This year You record an audio track with an I+O latency of 10.7 ms.
> Two year later you want to restore this session, but you don't remember
> the jackd settings you used. Originally audio and MIDI tracks were in
> sync, when you used 10.7 ms I+O latency. Within the years you got new
> hardware, you don't remember what latency you once used and starts jackd
> with a lower I+O latency. Nothing bad would happen for Ardour users, but
> a Qtractor user would run into sync issues. Am I mistaken?

No.

If you use different HW, latency will change even if you use the
same Jack settings, but it shouldn't matter. At least not if the
SW does the right thing, which is to store all positions on the
timeline in a way that makes them independent of latency, i.o.w.
as they would have been if there were no latency. All that takes
is is to correct for input latency when recording, and for output
latency when playing, in both cases using the actual values which
don't even have to be remembered. It's simple enough, there is no
excuse for getting it wrong. 

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)