On Mon, 2008-05-19 at 09:12 +0200, Frank Barknecht wrote:
Hallo,
Roman Haefeli hat gesagt: // Roman Haefeli wrote:
i made a patch, that uses several instances of an abstraction based on
the partconv~ external in order to do binaural spatialization of sounds
using a set of hrtf tables. the hrtf files are all loaded on loadbang
into tables, so that they can be accessed quickly. it is part of the
patch, that a 'set tablename' message to all [partconv~]s is sent
quite often, which leads to dropouts on the box, where the installation
is meant to run (for some reason not on my personal laptop). i also
noticed a difference in performance between an old version of partconv~
(0.1) and the current svn version, whereas the latter is more likely to
cause dropout at high 'set' message rates.
I had a quick look at the partconv~ source code and found that
everytime a set message is sent, partconv~ does quite a bit of
memory allocation to configure itself for the new convolution core.
This may be a reason for the dropouts if you set the objects with a
high rate, as memory allocation is not very realtime friendly. You
could try to avoid some of the sets by creating more partconv~
objects that statically refer to their tables. Of course that's a bit
tricky with 1400 tables ...
thanks for confirming, what i guessed. so one (probably not the
smartest) solution is to use a computer with fast memory access. in my
case, lowering the message rate and increasing jackd buffersize a bit
already helped.
roman
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