Hey
I've been trying to get a low latency with pd 04.25 in puredyne 9.10 with an NVidia HDA audio card. The audio card is listed as Nvidia Corporation MCP61 High Definition Audio (rev 2) using lspci | grep Audio.
With Jack there is bad glitching.
With Alsa I can run a patch wihtout glitching at latency in pd set to 60ms only if I minimize the pd window. Any time I move the mouse on the pd window, scroll the pd window or adjust a control in the pd window the audio drops out. This does not happen if the pd window is minimized and the mouse is moved in other windows. The audio works fine with the GEM window open.
I did install the latest NVidia graphics drivers from Nvidias site on both linux and Vista. Gem performance was not so good before this but is excellent now.
The patch I'm testing with runs great on Windows Vista using ASIO for all and latency in PD set to 50 ms.
The test patch uses GEM.
On Vista I'm using pd extended where as on linux it is plain pd with extended libraries.
Things I have tried(this time around). Reinstalled Alsa, Reinstalled PD,
I tried to install pd extended to see if that was the problem but it did not run after the install. I think my version of extended on Vista is 04.26.
I also tried compiling from source 04.26 on another system with no luck.
So my questions are. Is this possibly a pd problem or an Alsa problem? I have not done any hardware configuration with ALSA and do not know where to begin.
My guess is that it is probably a TCL/TK problem and lack of tuning the ALSA drivers.
I would alos like to know where to get a synaptics compatible upgrade of pd 0.43 and 0.426 plus synaptics packages for upgrading ALSA and jack.
Any info on getting the latency lower on linux would be greatly appreciated.
Thank You very much.
You can see a some videos of the patch I'm testing on youtube. http://www.youtube.com/watch?v=ghib62V9a7k