snd-hrtimer
Hi :)
I'm subscribed to 64 Studio devel list, but only receive emails from the users list, please send replies Cc to me if you reply from the developers list. Someone on LAD asked what timer preferred to use for sequencing. Because of this happy coincidence I found out, that for the default 64 Studio 3.0-beta3 kernel the module snd-hrtimer isn't loaded and in addition that there isn't such a module. Okay, because of ... $ cat /boot/config-2.6.29-1-multimedia-amd64 | grep HRTIMER # CONFIG_SND_HRTIMER is not set ... this is useless ... $ sudo -i # chgrp audio /dev/hpet # echo 1024 > /proc/sys/dev/hpet/max-user-freq # modprobe snd-hrtimer FATAL: Module snd_hrtimer not found. ... ;). Maybe you like to read the thread on LAD: * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025427.html> /Emanuel Rumpf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025428.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025429.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025430.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025432.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025433.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025434.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025435.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025436.html> /Ray Rashif / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025437.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025438.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025439.html> /Ralf Mardorf / MIDI jitter for events sent to external MIDI equipment might depend on this. Cheers, Ralf _______________________________________________ 64studio-devel mailing list 64studio-devel@lists.64studio.com http://lists.64studio.com/mailman/listinfo/64studio-devel |
snd-hrtimer
Hi :)
I'm subscribed to 64 Studio devel list, but only receive emails from the users list, please send replies Cc to me if you reply from the developers list. Someone on LAD asked what timer preferred to use for sequencing. Because of this happy coincidence I found out, that for the default 64 Studio 3.0-beta3 kernel the module snd-hrtimer isn't loaded and in addition that there isn't such a module. Okay, because of ... $ cat /boot/config-2.6.29-1-multimedia-amd64 | grep HRTIMER # CONFIG_SND_HRTIMER is not set ... this is useless ... $ sudo -i # chgrp audio /dev/hpet # echo 1024 > /proc/sys/dev/hpet/max-user-freq # modprobe snd-hrtimer FATAL: Module snd_hrtimer not found. ... ;). Maybe you like to read the thread on LAD: * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025427.html> /Emanuel Rumpf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025428.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025429.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025430.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025432.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025433.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025434.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025435.html> /Ralf Mardorf / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025436.html> /Ray Rashif / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025437.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025438.html> /James Warden / * [LAD] timers <http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-November/025439.html> /Ralf Mardorf / MIDI jitter for events sent to external MIDI equipment might depend on this. Cheers, Ralf _______________________________________________ 64studio-users mailing list 64studio-users@lists.64studio.com http://lists.64studio.com/mailman/listinfo/64studio-users |
snd-hrtimer
On 11/07/2009 03:21 PM, Ralf Mardorf wrote:
> Hi :) > [..] > Someone on LAD asked what timer preferred to use for sequencing. Because > of this happy coincidence I found out, that for the default 64 Studio > 3.0-beta3 kernel the module snd-hrtimer isn't loaded and in addition > that there isn't such a module. > > Okay, because of ... > > $ cat /boot/config-2.6.29-1-multimedia-amd64 | grep HRTIMER > # CONFIG_SND_HRTIMER is not set > Late follow up.. there's currently some discussion on LAU: quoting http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-May/069902.html >> In a different thread you mention, regarding jackd's use of snd-seq: >> the timing behaviour of the two -X options (seq and raw) are not very >> good. some might be sufficiently uncharitable as to call them >> unusable". >> >> Would using snd-hrtimer with snd-seq change this assessment? > > No, they are just badly designed and implemented from this > perspective. They both have substantial jitter built into their > design. _______________________________________________ 64studio-users mailing list 64studio-users@lists.64studio.com http://lists.64studio.com/mailman/listinfo/64studio-users |
snd-hrtimer
On 11/07/2009 03:21 PM, Ralf Mardorf wrote:
> Hi :) > [..] > Someone on LAD asked what timer preferred to use for sequencing. Because > of this happy coincidence I found out, that for the default 64 Studio > 3.0-beta3 kernel the module snd-hrtimer isn't loaded and in addition > that there isn't such a module. > > Okay, because of ... > > $ cat /boot/config-2.6.29-1-multimedia-amd64 | grep HRTIMER > # CONFIG_SND_HRTIMER is not set > Late follow up.. there's currently some discussion on LAU: quoting http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-May/069902.html >> In a different thread you mention, regarding jackd's use of snd-seq: >> the timing behaviour of the two -X options (seq and raw) are not very >> good. some might be sufficiently uncharitable as to call them >> unusable". >> >> Would using snd-hrtimer with snd-seq change this assessment? > > No, they are just badly designed and implemented from this > perspective. They both have substantial jitter built into their > design. _______________________________________________ 64studio-devel mailing list 64studio-devel@lists.64studio.com http://lists.64studio.com/mailman/listinfo/64studio-devel |
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