Hi
I just installed a Delta 410 card (like Delta 1010Lt but with fewer Ins) and am using the latest ASLA driver. For the first time in several years I need to tweak the audio settings when I run PD, otherwise I get glitches (DAC blocked DIO errors and spikes in the sound).
I have been experimenting with the options:
-audiobuf -blocksize -frags -fragsize
...and found that -audiobuf with a setting about 100 works well. In my book this should add a horrible latency, but I cannot notice it (I use a graphical application of an exploding firework to trikker playback though netsend, so I use 'visual' latency measurement).
My question(s):
- What does a audiobuf size of 100 mean in terms of latency (how many
samples or ms are we talking about here?)
- What does the other audio settings mean?
TIA
Soeren
Come on! Somebody must know this :-)
/Soeren
I just installed a Delta 410 card (like Delta 1010Lt but with fewer Ins) and am using the latest ASLA driver. For the first time in several years I need to tweak the audio settings when I run PD, otherwise I get glitches (DAC blocked DIO errors and spikes in the sound).
I have been experimenting with the options:
-audiobuf -blocksize -frags -fragsize
...and found that -audiobuf with a setting about 100 works well. In my book this should add a horrible latency, but I cannot notice it (I use a graphical application of an exploding firework to trikker playback though netsend, so I use 'visual' latency measurement).
My question(s):
- What does a audiobuf size of 100 mean in terms of latency (how many
samples or ms are we talking about here?)
- What does the other audio settings mean?
Søren Bovbjerg wrote:
Come on! Somebody must know this :-)
My question(s):
- What does a audiobuf size of 100 mean in terms of latency (how
many samples or ms are we talking about here?)
i think around 100ms latency...
- What does the other audio settings mean?
i couldn't figure it out...
Hi all,
I only have 0.9 RC 3 ALSA, and am invoking Pd with:
pd -alsa -rt -audiobuf 15
with a Midiman Delta 66. Seems to work fine. I don't know about the most recent ALSA; I'm sick of re-installing new (frequently broken) versions of it...
cheers Miller
On Mon, Jan 27, 2003 at 02:38:17PM +0100, smoerk wrote:
Søren Bovbjerg wrote:
Come on! Somebody must know this :-)
My question(s):
- What does a audiobuf size of 100 mean in terms of latency (how
many samples or ms are we talking about here?)
i think around 100ms latency...
- What does the other audio settings mean?
i couldn't figure it out...
PD-list mailing list PD-list@iem.kug.ac.at http://iem.kug.ac.at/cgi-bin/mailman/listinfo/pd-list
On Mon, 27 Jan 2003, Miller Puckette wrote:
Hi all,
I only have 0.9 RC 3 ALSA, and am invoking Pd with:
pd -alsa -rt -audiobuf 15
with a Midiman Delta 66. Seems to work fine. I don't know about the most recent ALSA; I'm sick of re-installing new (frequently broken) versions of it...
No you shouldn't, rc6 is broken for delta cards.
No you shouldn't, rc6 is broken for delta cards.
Well, for now I don't have much of a choice, since the Delta 410 wasn't added before late December. So I cannot even use rc6 but must rely on recent CVS snapshots - which seem to often introduce as many bugs as they fix :-(
Anyway, I have a working driver ATM and if I run it with -rt I can use quite low audiobuf settings ( -15 works). The strange thing is, that I cannot notice the difference in using -audiobuf 15 100 or 1000. I have PD synced through netreceive to an OpenGL rendering of a firework explosion. The explosion triggers a 'bang' sample and I would expect a 1 second delay using an audiobuffer of 1000. However, the sound response is instant regardeless of the setting - but the 'DAC blocked' errors and audio clicks disappear.
I will be watching the ALSA dev list to see if the make improvements.
Cheers Soeren
On Tue, 28 Jan 2003, Søren Bovbjerg wrote:
No you shouldn't, rc6 is broken for delta cards.
Well, for now I don't have much of a choice, since the Delta 410 wasn't added before late December. So I cannot even use rc6 but must rely on recent CVS snapshots - which seem to often introduce as many bugs as they fix :-(
Oops, let me rephrase that. The ice1712 driver is broken, at least with delta cards. But the CVS version is supposed to be working though.
-
Kjetil S. Matheussen -
Miller Puckette -
smoerk -
Søren Bovbjerg