Re: [LAD] Routing signals in mixer (Ardour, Qtractor)

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To: <linux-audio-dev@...>
Date: Monday, July 12, 2010 - 8:30 pm

On 07/12/2010 07:27 PM, Louigi Verona wrote:

aha, you are :)

in short, qtractor internal process flow doesn't play well with direct
feedback loops, like connecting any of its output ports to any of its
own input ports.

problem is that input buffers are always read before any output signal
is produced, while on the same process period cycle. iow, you're
consuming what hasn't been produced yet. that's why you'll probably get
silence, at best.

problem, if you call it that way, can be solved artificially by
inserting an "all-pass" jack client in between qtractor outs and ins. of
course this will introduce an inevitable period latency. but its the
only way to workaround the issue.

i'm afraid Jeremy did present an interesting proof-of-concept exercise
re. using the ladspa vocoder in qtractor. afaics, he didn't said it was
of any use, let alone practical :)

cheers
--
rncbc aka Rui Nuno Capela
rncbc@rncbc.org
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Messages in current thread:
[LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 7:49 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 9:32 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 9:50 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 12:55 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Mon Jul 12, 5:26 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Mon Jul 12, 6:27 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Thu Jul 15, 12:22 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Harry Van Haaren, (Thu Jul 15, 5:23 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), James Morris, (Thu Jul 15, 5:32 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Harry Van Haaren, (Thu Jul 15, 5:39 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Thu Jul 15, 5:49 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Fri Jul 23, 11:12 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Rui Nuno Capela, (Mon Jul 12, 8:30 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Rui Nuno Capela, (Mon Jul 12, 10:37 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Mon Jul 12, 8:35 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Thu Jul 15, 12:07 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Mon Jul 12, 3:08 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Mon Jul 12, 12:05 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Thu Jul 15, 11:59 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Rui Nuno Capela, (Wed Jul 7, 1:15 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Rui Nuno Capela, (Wed Jul 7, 6:38 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 6:40 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 6:46 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 6:49 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 7:01 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 5:41 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 5:46 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 2:40 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 8:52 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Natanael Olaiz, (Wed Jul 7, 8:05 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 8:08 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 8:15 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 8:07 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Natanael Olaiz, (Wed Jul 7, 9:06 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 9:12 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Natanael Olaiz, (Wed Jul 7, 9:24 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 9:25 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Natanael Olaiz, (Wed Jul 7, 9:38 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 9:54 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 10:59 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Jeremy Jongepier, (Wed Jul 7, 12:37 pm)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 11:00 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 9:15 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 9:18 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 9:18 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Louigi Verona, (Wed Jul 7, 9:19 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 9:25 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 8:11 am)
Re: [LAD] Routing signals in mixer (Ardour, Qtractor), Ralf Mardorf, (Wed Jul 7, 8:03 am)