On 09/04/2014 09:33 PM, Ralf Mardorf wrote:
-------- Forwarded Message --------From: Ralf Mardorf
<ralf.mardorf@xxxxxxxxxxxxxx>
To: qtractor-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Qtractor-devel] ; ) Was - Re: Session management
with NSM
Date: Thu, 04 Sep 2014 22:31:15 +0200
Mailer: Evolution 3.12.5
On Thu, 2014-09-04 at 21:27 +0100, Rui Nuno Capela wrote:
On 09/04/2014 07:49 PM, Ralf Mardorf wrote:
Rui :)
please consider to automatically add to
File > Properties ... > Description
the jackd "in" and "out" reported latency ;). Since the MIDI resolution
steps don't provide ms, frame information, a written note could help to
fix sync problems, without using a calculator.
(I don't need it, perhaps you could add an option to the preferences, to
uncheck this feature ;)
jack_lsp -l does report latency of every port
byee
It doesn't report the latency a session was recoded 2 years ago.
and why would that be interesting?
qtractor does its "recording/input latency compensation" of audio cľips
*at the time* the audio material is captured, so that material gets
aligned with the audio/MIDI content already in session and possibly
being played back at the time of the recording. never again it gets
adjusted no matter what jackd parameters change later, be that for worse
or better. that's it.
please understand that this is the only kind of latency compensation
qtractor does and nothing else. nb. qtractor does NOT compensate for
in-line output or plugin chain latency. never did and quite frankly it
won't do so soon, i'm afraid.
i really don't see how having distinct jackd i/o latency settings
(buffer-size, periods, sample-rate) may lead to audio going out of sync
to MIDI--if it does get out-of-sync anyway, it is probably because
something else but latency compensation related, not to tell that
session-management has nothing to do with either.
cheers
--
rncbc aka Rui Nuno Capela
rncbc@xxxxxxxxx
ps. if audio and MIDI get out of sync, timer type and/or resolution
might be the top suspect.
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