Looks like there are some problems with the soundcard drivers. I'm running very heavy patches with 3 ms. Both on Windows XP and Ubuntu. Audio and MIDI. However, on Windows I am using a RME HDSP card which has very good ASIO drivers. Don't forget to set system options to "background tasks" (very important!). I also noticed that in general Intel CPUs are pretty bad for Pd since they use hyperthreading which makes Pd see two CPUs and uses only 50% of one core. AMDs are twice as efficient because Pd uses the entire core.
Ingo
cyrille henry wrote:
but since you don't like this, you should : in pd / startup add in "startup flags" : -noaudio -audiobuf 0 -mididev 3 than : "save all setting" and it should work for next reboot...
That's fine but what if you want to trigger sound with the MIDI input? I've been trying some settings and find that if I set the delay less than 100ms the MIDI delay goes up to about 500ms, if it works at all.
I usually only use Pd on WinXp to generate background tracks since the latency is so awful compared to linux.
Martin
Hyperthreading can be disabled - I never tryed it myself - but its in BIOS advanced options for most computers/motherboards I've seen.
Depending on the situation that can be either good of bad, If you only run one intensive cpu program (i.e.: one instance of PD) is good to give a full cpu to it, but if you run for instance Renoise (which for me is cpu intensive) and Pd, disabling hyperthreading will result in even more buffer glitch. I think some game folks used to disable hyperthreading in intel's p4 and get better rates than with it turned on, just to serve as a mere example
- but then again Software Engineers would argue that this is just a matter
of how threaded the programs are, and how they make good use of that.
Best regards, Pedro
On Sun, Jun 6, 2010 at 6:08 PM, Ingo Scherzinger ingo@miamiwave.com wrote:
Looks like there are some problems with the soundcard drivers. I'm running very heavy patches with 3 ms. Both on Windows XP and Ubuntu. Audio and MIDI. However, on Windows I am using a RME HDSP card which has very good ASIO drivers. Don't forget to set system options to "background tasks" (very important!). I also noticed that in general Intel CPUs are pretty bad for Pd since they use hyperthreading which makes Pd see two CPUs and uses only 50% of one core. AMDs are twice as efficient because Pd uses the entire core.
Ingo
cyrille henry wrote:
but since you don't like this, you should : in pd / startup add in "startup flags" : -noaudio -audiobuf 0 -mididev 3 than : "save all setting" and it should work for next reboot...
That's fine but what if you want to trigger sound with the MIDI input? I've been trying some settings and find that if I set the delay less than 100ms the MIDI delay goes up to about 500ms, if it works at all.
I usually only use Pd on WinXp to generate background tracks since the latency is so awful compared to linux.
Martin
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-
Ingo Scherzinger -
Pedro Lopes