[Ardour-Users] time shift when recording from one midi track to another
Victor
victor at svictor.net
Thu Jan 25 14:24:48 PST 2018
Hi,
I’m trying to understand the following behavior in Ardour 5.12.0
1. Create 2 midi tracks, A and B
2. On track A, create a midi region and put 1 note every two beats
in it
(notes aligned to the grid).
3. On track B record the midi output of track A.
I would have expected the resulting region on B to be an exact
copy of
the region on A. Instead, all notes on B are shifted
slightly before the notes on A. The very first note of A is
actually not
rendered at all on B (maybe because it’d start too early before
the B region).
I attach a screenshot.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screenshot_2018-01-25_23-20-51.png
Type: image/png
Size: 15860 bytes
Desc: not available
URL: <http://lists.ardour.org/pipermail/ardour-users-ardour.org/attachments/20180125/1b339639/attachment.png>
-------------- next part --------------
Is this a side-effect of read-ahead latency compensation[1]?
If so, can I set/disable the read-ahead time somewhere in Ardour?
Looking at latency, I also wonder how to interpret the information
in
Window --> Audio/Midi Setup. It says that my buffer size is 128
samples
and there is an additional 2.7ms between brackets after that. Is
this
a latency estimate?
Qjackctl says that my latency is 8ms.
I start jack from qjacktl with the following settings:
Samplerate: 48000
Frames/Period: 128
Periods/Buffer: 3
Regards,
Victor
[1]http://manual.ardour.org/synchronization/latency-and-latency-compensation/
More information about the Ardour-Users
mailing list