Improving playback performance??
I'm getting alot of clicks (dropped samples basically on playback) either when jack realtime setting is turned on or off. Recording (thou not thoroughly tested) seems to be unaffected.
My system is as follows:
M-Audio Delta 44
Athlon XP2000+, 1GB pc2700 ram, 2x133ATA HDD's, Fedora Core 5, Vanilla Kernel 220.127.116.11 with preemtive scheduling, jack 0.100.1, and ardour version 0.99 (not sure what sub version, but it's the fc4 ccrma rpm).
I have just recently shifted from a cubase sx winxp system, to a purely open source system, so i have a vague idea of what sort of performance i can get out of my hardware. What I would do in cubase, would be kill everything (even explorer.exe) minus what was the bare minimum, kill all effects and/or plugins and i'd get glitch free playback and recording for (test up to) about 16 tracks, recording up to 4 at a time, at 88.2khz, 24bit. I'd then tend mix with processer heavy effects after all the recording was done, and i would get some glitches, but minor ones, and they wouldn't be on a mixdown anyway.
What I'm getting at the moment, is alot of glitches on playing. Baring in mind i've only shutdown a few of the standard process/services in a fedora/gnome session. Gnome itself is still running. With jack realtime set, I'd also be getting glitches in the mixdowns, at a varying frequence depending what the latency was set to inside ardour. With realtime switched off, it mixes down perfectly, but playback hasn't really changed.
I have only really tested this system doing mixing at the moment, recording a few seconds here and there to see if recording was working, and from what i can tell the recording is glitch free anyway. It's just a audioable eyesaw to be mixing with so many glitches.