[linux-audio-user] APIC, IRQ, and an HDSP9652

Hi all, This is my first post here, so hello everybody. I'm running PlanetCCRMA's FC3 distro (low-latency kernel 2.6.11-0.3.rdt.rhfc3.ccrma) on an Athlon 64 3000+ w. an NF4 chipset. As far as sound goes, I'm using the integrated CK804 (w. snd-intel8x0 drivers) and an RME HDSP9652 (w. snd-hdsp). The questions: 1. I've read a lot about getting the IRQ of the soundcard to as high a priority as possible. How important is this? Is it possible with setpci if I reserve an IRQ in the BIOS, or only by swapping cards? 2. Should I enable or disable APIC? I've heard muddy answers, but what I know is that it always leaves my HDSP9652 at IRQ's from 16-20. Here's the output of cat /proc/interrupts. # cat /proc/interrupts CPU0 0: 1556590 XT-PIC timer 0/56590 1: 3324 XT-PIC i8042 0/3324 2: 0 XT-PIC cascade 0/0 3: 3948 XT-PIC NVidia CK804 0/3948 4: 0 XT-PIC hdsp 0/0 5: 97413 XT-PIC ohci_hcd, nvidia 0/97413 7: 0 XT-PIC parport0 0/0 8: 1 XT-PIC rtc 0/1 9: 0 XT-PIC acpi 0/0 10: 0 XT-PIC libata, ehci_hcd 0/0 11: 37516 XT-PIC libata, eth0 0/37516 12: 146561 XT-PIC i8042 0/46561 14: 15416 XT-PIC ide0 0/15416 15: 12105 XT-PIC ide1 0/12105 NMI: 0 LOC: 1556573 ERR: 0 MIS: 0 3. Would you recommend I set my first soundcard to be the CK804 or should I leave the RME as the first soundcard? 4. Should I just disable the CK804 and throw in an emu10k1? Becuase I could do that, too. Any help would be appreciated, and if I left something out, let me know. Thanks! -Nathan