Hi there - has anyone had the problem with PD where the audio gets "scratchy" after a while? I am using tabread4~ to read samples out of arrays, and sequencing this with OSC. From there, I run the audio through some effects (vcf~, a tremolo and ring-modulator that I built, a pitch-shifter, etc..) It seems like after a minute or so, the audio starts getting really grainy and broken up. Even when I re-route the signal *around* all of the effects, it remains deteriorated until I restart PD. At first I thought that maybe I was messing things up by throw~ ing too many signals at the same time onto a summing bus, and it was clipping, but I've since fixed that problem. Any ideas about what might be causing this, and how I could fix? much appreciated, David Merrill
please always tells us about your setup. (we should have a "bug report submital" form on the website tyhat has these questions)
what os? what version of pd? what sound driver? what settings on your sound driver?
i get "scratchy" sound when my cpu pegs (i have a nasty bug in my performance setup which causes cpu pegging sometimes, i havnt been able to track it down yet and its driving me bonkers)
David Merrill wrote:
Hi there - has anyone had the problem with PD where the audio gets "scratchy" after a while? I am using tabread4~ to read samples out of arrays, and sequencing this with OSC. From there, I run the audio through some effects (vcf~, a tremolo and ring-modulator that I built, a pitch-shifter, etc..) It seems like after a minute or so, the audio starts getting really grainy and broken up. Even when I re-route the signal *around* all of the effects, it remains deteriorated until I restart PD. At first I thought that maybe I was messing things up by throw~ ing too many signals at the same time onto a summing bus, and it was clipping, but I've since fixed that problem. Any ideas about what might be causing this, and how I could fix? much appreciated, David Merrill
PD-list mailing list PD-list@iem.at http://iem.at/cgi-bin/mailman/listinfo/pd-list
Josh Steiner wrote:
please always tells us about your setup. (we should have a "bug report submital" form on the website tyhat has these questions)
what os? what version of pd? what sound driver? what settings on your sound driver?
i get "scratchy" sound when my cpu pegs (i have a nasty bug in my performance setup which causes cpu pegging sometimes, i havnt been able to track it down yet and its driving me bonkers)
David Merrill wrote:
Hi there - has anyone had the problem with PD where the audio gets "scratchy" after a while? I am using tabread4~ to read samples out of arrays, and sequencing this with OSC. From there, I run the audio through some effects (vcf~, a tremolo and ring-modulator that I built, a pitch-shifter, etc..) It seems like after a minute or so, the audio starts getting really grainy and broken up. Even when I re-route the signal *around* all of the effects, it remains deteriorated until I restart PD. At first I thought that maybe I was messing things up by throw~ ing too many signals at the same time onto a summing bus, and it was clipping, but I've since fixed that problem. Any ideas about what might be causing this, and how I could fix?
hi, if you're talking WinXP:
i have an audio problem, that results in "scratchy sound" now and then, as long as PD is not at least in HIGH priority mode.
i think by default it is in NORMAL mode and by setting it automatically to HIGH (by batch command "cmd /c start /High D:\pd\bin\pd.exe") i removed the problem. it is important though that "wish32.exe" (the GUI) stays in NORMAL priority
just my 2c
ciao
oliver
much appreciated, David Merrill
PD-list mailing list PD-list@iem.at http://iem.at/cgi-bin/mailman/listinfo/pd-list
interesting, i've occastionally set the priority higher in the taskmanager which seems to help avoiding stutters when moving objects around and such, but when i try your command like alone, it works: pd is running at high priority, but if i stick "cmd /c start /High " in front of my big line in the .bat with all the -lib's and -path's and -audiodev's and such, it starts as normal priority... any ideas?
hi, if you're talking WinXP:
i have an audio problem, that results in "scratchy sound" now and then, as long as PD is not at least in HIGH priority mode.
i think by default it is in NORMAL mode and by setting it automatically to HIGH (by batch command "cmd /c start /High D:\pd\bin\pd.exe") i removed the problem. it is important though that "wish32.exe" (the GUI) stays in NORMAL priority
just my 2c
ciao
oliver
i aldo ran into this problem, and found out a weird thing:
if any midi-stuff is defined in the start-up script (i.e. -midiindev etc.), setting HIGH priority using the "start" command doesn't work! really haven't got a clue why. so there's several possibilities:
1.) deactivate MIDI in your start-up script if you don't need it. 2.) if you do need MIDI, start a second PD and route your midi stuff to your NON-MIDI PD using OSC or netsend/netreceive 3.) there's a nice little freeware command-line utility called "process". you can download it here: http://www.beyondlogic.org/solutions/processutil/processutil.htm
this allows to set priorities with the command line. it's just an .exe file that you put where your machine finds it. then you also need the "motex" library for the [system] object. give it a message called [process -p PD.EXE High(
you can then automate this thing with loadbang (and maybe a slight delay
- like 1 second...)
i know this is quirky, but at least it works and functions automatically.
good luck
oliver
Josh Steiner wrote:
interesting, i've occastionally set the priority higher in the taskmanager which seems to help avoiding stutters when moving objects around and such, but when i try your command like alone, it works: pd is running at high priority, but if i stick "cmd /c start /High " in front of my big line in the .bat with all the -lib's and -path's and -audiodev's and such, it starts as normal priority... any ideas?
hi, if you're talking WinXP:
i have an audio problem, that results in "scratchy sound" now and then, as long as PD is not at least in HIGH priority mode.
i think by default it is in NORMAL mode and by setting it automatically to HIGH (by batch command "cmd /c start /High D:\pd\bin\pd.exe") i removed the problem. it is important though that "wish32.exe" (the GUI) stays in NORMAL priority
just my 2c
ciao
oliver
I've also had problems with sound getting scratchy, but this start command seems to do the trick. Oddly enough, for me it works perfectly, with midi ins and -libs and all. But I can't see why I got it working, I just put the "cmd /c start /high" first in my .bat file. strange.
Johannes
ps. "hello" to the list, since this is my first post. and "thank you" to the developers, since PD is a really great program.
oliver wrote:
i aldo ran into this problem, and found out a weird thing:
if any midi-stuff is defined in the start-up script (i.e. -midiindev etc.), setting HIGH priority using the "start" command doesn't work! really haven't got a clue why. so there's several possibilities:
1.) deactivate MIDI in your start-up script if you don't need it. 2.) if you do need MIDI, start a second PD and route your midi stuff to your NON-MIDI PD using OSC or netsend/netreceive 3.) there's a nice little freeware command-line utility called "process". you can download it here: http://www.beyondlogic.org/solutions/processutil/processutil.htm
this allows to set priorities with the command line. it's just an .exe file that you put where your machine finds it. then you also need the "motex" library for the [system] object. give it a message called [process -p PD.EXE High(
you can then automate this thing with loadbang (and maybe a slight delay - like 1 second...)
i know this is quirky, but at least it works and functions automatically.
good luck
oliver
Josh Steiner wrote:
interesting, i've occastionally set the priority higher in the taskmanager which seems to help avoiding stutters when moving objects around and such, but when i try your command like alone, it works: pd is running at high priority, but if i stick "cmd /c start /High " in front of my big line in the .bat with all the -lib's and -path's and -audiodev's and such, it starts as normal priority... any ideas?
hi, if you're talking WinXP:
i have an audio problem, that results in "scratchy sound" now and then, as long as PD is not at least in HIGH priority mode.
i think by default it is in NORMAL mode and by setting it automatically to HIGH (by batch command "cmd /c start /High D:\pd\bin\pd.exe") i removed the problem. it is important though that "wish32.exe" (the GUI) stays in NORMAL priority
just my 2c
ciao
oliver
Sorry for the incomplete post - the details of my scratchy audio system are:
Linux (kernel 2.4.x) Pd 0.37.1 Using the alsa drivers on a Thinkpad As for the settings for alsa - which ones would be important, and more importantly : where would I find them?
thanks, -David
Josh Steiner wrote:
please always tells us about your setup. (we should have a "bug report submital" form on the website tyhat has these questions)
what os? what version of pd? what sound driver? what settings on your sound driver?
i get "scratchy" sound when my cpu pegs (i have a nasty bug in my performance setup which causes cpu pegging sometimes, i havnt been able to track it down yet and its driving me bonkers)
David Merrill wrote:
Hi there - has anyone had the problem with PD where the audio gets "scratchy" after a while? I am using tabread4~ to read samples out of arrays, and sequencing this with OSC. From there, I run the audio through some effects (vcf~, a tremolo and ring-modulator that I built, a pitch-shifter, etc..) It seems like after a minute or so, the audio starts getting really grainy and broken up. Even when I re-route the signal *around* all of the effects, it remains deteriorated until I restart PD. At first I thought that maybe I was messing things up by throw~ ing too many signals at the same time onto a summing bus, and it was clipping, but I've since fixed that problem. Any ideas about what might be causing this, and how I could fix? much appreciated, David Merrill
PD-list mailing list PD-list@iem.at http://iem.at/cgi-bin/mailman/listinfo/pd-list
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David Merrill -
Johannes Burström -
Josh Steiner -
oliver