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On 01/19/2014 02:32 PM, Paul Davis wrote:<br>
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<div class="gmail_quote">On Sun, Jan 19, 2014 at 4:17 PM,
Studio Channing <span dir="ltr"><<a
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wrote:<br>
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Hi all, is there any way to allow Ardour to recognize
tempo changes as produced by a different Jack transport
master?<br>
<br>
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<div>Ardour will always ignore the tempo information present
in the JACK transport system.<br>
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<div>Applications like Ardour require a "tempo map" rather
than a simplistic instantaneous value for tempo and meter,
unless they are to be limited to pieces that remain at the
same tempo + meter throughout. We have never devised an
acceptable, portable "tempo map" description that could be
shared.<br>
<br>
--p<br>
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<br>
Thanks for your reply, and for making such great software!<br>
<br>
Are you saying that Ardour will always require the tempo information
ahead of time? Otherwise couldn't a tempo map in theory be
constructed on the fly from the incoming values?<br>
<br>
In practice that's actually what we see when we reverse roles -
using Ardour as a MIDI sequencer with tempo changes in its session
and Qtractor as the harddrive recorder: when Ardour as timebase
master changes the tempo Qtractor shows/uses the new value and also
creates its own tempo marker at that "spot".<br>
<br>
Granted this raises questions - like where that spot is precisely -
sounds like JACK transport will only update tempo between process
cycles? Also the question of how incoming tempo changes interact
with a pre-existing session tempo map - looks like Qtractor just
deletes existing markers as you roll through them..<br>
<br>
In any case, what if we abandon tempo via JACK transport - is it
possible to have Ardour recognize incoming tempo changes "on the
fly" via other means? e.g. sending MIDI tempo events FF 51.. ?<br>
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