Re: [LAD] Plugin buffer size restrictions

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To: Stefano D'Angelo <zanga.mail@...>
Cc: <linux-audio-dev@...>
Date: Sunday, May 27, 2012 - 8:26 pm

On Sun, May 27, 2012 at 09:59:29PM +0300, Stefano D'Angelo wrote:

> If I understand correctly an implication would be that you get uniform

Indeed, interpolation introcudes delay. If control values are
delivered at a constant rate it's quite easy for a host to
compensate for this. What is needed in that case is that the
delay is *defined*. But there is anothor issue you touch on.

If automation data is the result of 'real time' input, then
that delay doesn't matter - the user, while creating the data
using some GUI widget or a HW controller, will compensate for
it because he/she simply has no other choice. Then, if the host
delivers the data at the same time (w.r.t. the audio) as when
it was recorded, then the plugin will do the same things and
the user will hear the result he/she wanted.

If OTOH the automation data is created by e.g. drawing some
curves in a graphical interface (with probaby the audio wave-
form as a reference) then you don't want that delay, and the
host shoudl compensate for this.

In most cases (general audio effects in a DAW) it just doesn't
matter much. The only thing (apart from synthesis/instruments)
that need accurate timing is the 'mute' function when used to
remove unwanted noises etc. But that is usually handled by the
host itself, and anyway automation is not the best way to deal
with such things - editing is.

Ciao,

--
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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Messages in current thread:
[LAD] Plugin buffer size restrictions, David Robillard, (Sat May 26, 2:43 am)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sat May 26, 10:02 am)
Re: [LAD] Plugin buffer size restrictions, Tim E. Real, (Sat May 26, 11:47 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 12:58 am)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat May 26, 6:24 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sat May 26, 8:05 pm)
Re: [LAD] Plugin buffer size restrictions, Stefano D'Angelo, (Sun May 27, 6:59 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sun May 27, 8:26 pm)
Re: [LAD] Plugin buffer size restrictions, Stefano D'Angelo, (Sun May 27, 9:00 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sun May 27, 9:33 pm)
Re: [LAD] Plugin buffer size restrictions, Stefano D'Angelo, (Sun May 27, 11:59 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Mon May 28, 12:17 pm)
Re: [LAD] Plugin buffer size restrictions, Stefano D'Angelo, (Mon May 28, 3:05 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Mon May 28, 5:01 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Mon May 28, 5:30 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Mon May 28, 7:48 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Mon May 28, 9:08 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Fri Jun 1, 10:09 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Fri Jun 1, 10:22 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Fri Jun 1, 10:42 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Fri Jun 1, 10:56 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat Jun 2, 12:22 am)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat Jun 2, 2:40 am)
Re: [LAD] Plugin buffer size restrictions, Tim Goetze, (Sat Jun 2, 9:32 am)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat Jun 2, 4:16 pm)
Re: [LAD] Plugin buffer size restrictions, Tim Goetze, (Mon Jun 4, 8:08 am)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Mon May 28, 10:41 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Tue May 29, 3:55 am)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 8:01 pm)
Re: [LAD] Plugin buffer size restrictions, Stefano D'Angelo, (Sun May 27, 8:17 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat May 26, 9:08 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sat May 26, 10:02 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 12:48 am)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sun May 27, 11:16 am)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 4:05 pm)
Re: [LAD] Plugin buffer size restrictions, Paul Davis, (Sun May 27, 2:01 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 5:19 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sun May 27, 7:56 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sun May 27, 10:33 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Mon May 28, 10:53 am)
Re: [LAD] Plugin buffer size restrictions, Thorsten Wilms, (Mon May 28, 11:54 am)
Re: [LAD] Plugin buffer size restrictions, Paul Davis, (Sat May 26, 8:23 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat May 26, 11:08 pm)
Re: [LAD] Plugin buffer size restrictions, Fons Adriaensen, (Sat May 26, 8:59 pm)
Re: [LAD] Plugin buffer size restrictions, Paul Davis, (Sat May 26, 10:34 pm)
Re: [LAD] Plugin buffer size restrictions, Adrian Knoth, (Sat May 26, 6:42 pm)
Re: [LAD] Plugin buffer size restrictions, David Robillard, (Sat May 26, 8:27 pm)