On Thu, Feb 26, 2009 at 9:21 PM, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > On Thu, Feb 26, 2009 at 4:20 PM, tizo <tizone@xxxxxxxxx> wrote: >> >> Hi there, >> >> Sorry about my previous mail. I was just starting to write a draft >> about the topics I want to ask, and I accidentally push the send >> button. >> >> Well, my goal is to play two midi keyboards, sending the events >> through jackd, to qsynth. My computer is a Laptop HP 550, with HDA >> Intel sound card, 3 GB of memory, and a Core 2 DUO CPU of 1.40 GHz. My >> OS is UbuntuStudio 8.04, with kernel 2.6.24-23-rt. >> >> First of all, I cannot run jackd without xruns, if I configure it with >> 32 frames per period, or less. I am running it as root, with realtime, >> and a priority of 70. As soon as I run it, it starts to count xruns, >> and I am only executing jackd. > > 32 frames per interrupt is VERY ambitious with an Intel HDA chipset. Its not > impossible but every single part of your system has to be "just right" for > this to work. I would start with a less ambitious goal first, and get some > experience with the setup before trying to get all the way to this latency > level. > > moving to USB will likely make things worse. latencies like this are best > accomplished with good, prosumer level PCI audio interfaces. > > --p > Ok. As I said in another email, I have to make more serious tests with both midi keyboards, but I think that I could play right with 64 or 128 frames (with some xruns). Anyway, I am thinking in buy a new desktop PC, and use it with my old Sound Blaster Live. I guess that I could do much more things with that configuration, not just play. How about the performance of that card?. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
