[Ardour-Users] Ardour 5.6 moves MIDI notes to the left?

[Paul Davis]

Ardour carries out a process we call "alignment" when capturing data, which
typically means moving it a little earlier than the time at which is was
capture, to compensate for latency in the data pipeline that exists between
your hard disk storage and actual audio. It is a very complex system, much
more complex than most users would likely guess, and the behaviour varies
depending on the I/O connectivity of the track in question. If a track is
connected to actual hardware, the alignment process is different than if
the track is wired only to software sources.

So .. (1) what buffer size are you using (2) are you using Pianoteq as a
standalone synth or as an LV2 plugin, and if the former, how are you
bridging MIDI into Ardour?



On Mon, Feb 13, 2017 at 12:41 AM, Mirko Horstmann <bb at mirkokosmos.net>
wrote:

> Hi,
>
> I was about to file a bug report for this, but it seems so obvious, I'm
> not sure if I'm doing something wrong...
>
> Whenever I record MIDI, Ardour 5.6 will show the notes in their right
> position during recording but after I stop the recording, it'll move the
> notes to the left in time line by a few hundred milliseconds. I checked
> this several times playing to the metronome and it's also apparent when
> recording the audio at the same time, the following is with Pianoteq 5 but
> it's the same when I use a hardware synth, in the screenshots, it's about
> 400 milliseconds but I think I've seen other amounts, too:
>
> MIDI vs Audio during recording:
> http://www.mirkokosmos.net/images_in_forums/ardour_during_recording.png
>
> MIDI vs. Audio after recording:
> http://www.mirkokosmos.net/images_in_forums/ardour_after_recording.png
>
> I cannot remember this happening in earlyer versions.
>
> Mirko
>
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