[PD] jack clicks but alsa or oss runs smoothly
Iain Mott
mott at reverberant.com
Sun May 1 08:37:01 CEST 2005
Hello
I'm running an a Pd patch that reads and writes to disk simultaneously
with a number readsf~ and writesf~ objects. It runs very well using alsa
or with oss emulation but produces occasional clicks when running with
jack. I'm wondering if there's anything I can do to fix this?
Latency is not an issue with this application and i'm running the
following to set up jack:
/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p2048 -n2 &
Pd includes the following start options: -rt -jack
Have compiled pd-0.38-4 with the following configuration: ./configure
--enable-newhash --enable-jack --enable-fftw --enable-simd
--enable-optimize=pentium4 --enable-threadedsf --enable-atomic –
enable-debug
I'm using a Gentoo 2.6.10 kernel. Also using realtime-lsm to get
non-root realtime priority (althought this feature doesn't seem to
create any audible benefits or problems in this particular patch). The
computer is a Compaq Presario R3000 laptop using atiixp alsa drivers.
alsa is being loaded as a module and not compiled into the kernel
(haven't tried compiling into the kernel)
When clicks occur, Pd reports errors such as:
8.41 A/D/A sync
18.41 A/D/A sync
18.41 A/D/A sync
18.78 unknown
18.78 unknown
18.78 unknown
Can anyone please suggest what might be causing the glitches? (Ardour
by-the-way seems to run well heavily loaded, without any glitches)
Best, Iain
_______
Iain Mott
www.reverberant.com
More information about the Pd-list
mailing list