[LAU] progressive time stretch

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To: lau <linux-audio-user@...>
Date: Friday, February 14, 2014 - 5:59 pm

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Hi, I have a percussion piece written in hydrogen and recorded from
there into ardour 3, one track per instrument. At a certain point I'd
like to have an accelerando, i.e. a progressive tempo increase. What are
my options?

Best would be able to do it from within ardour, having many tempo
changes, ardour set as jack master, so that when I play that part it
gradually increases the jack playback tempo. The second solution would
be to export the mix from ardour and use another program to increase the
tempo in the .wav file.

The problem is I'm not sure how exactly go about for neither
solution... for the first one, could I use a knob on my midi
controller to generate a smooth succession of tempo changes? How? For
the second, which program could I use? I seem to recall there was some
utility to generate rubberband map files, but I can't find it ATM.

cheers,
renato
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