EXS 24 Logic Sampler Users Group

Message posted by David Pelletier <studiopelletier@...>:

Hi. I am the banleader and bassist of Cirque du Soleil's Alegria. We are
using Logic Pro on stage with mainly the EXS24. 

On my station (Powermac G5 Dual 2 GHz, 4 GB ram (8 X 512MB), OS 10.3.9,
Logic Pro 6.4.3, M-Audio Firewire 410, driver 1.5), I use the EXS24 to trig
long audio files that we call "sequences" with a Roland PK-5 bass pedal. In
many cases these audio files are layered and use different outputs via
groups/AUX, and vary from a few seconds to up to 7 minutes, depending on the
songs. 

The whole show is loaded in one Logic song. I have about 15 EXS24 loaded, so
15 tracks in the arrange. Activity Monitor reports that about 2.2 GB are
used on the 4 GB available. No virtual memory (streaming) is used. 

This system has worked flawlessly for 692 shows to this date (which
represents about two years of shows). But in the past 3 weeks I've had 3
glitches (in about 30 shows), more like stuttering in fact. Audio drops out
in the middle of the file playback, stutters a bit, and comes back on as if
nothing happened, but when it happens I have to stop and retrig, because the
time goes off. So it's really a stuttering and not just a sound drop out.
Glitches are random, never in the same file playback. 

I have 2 theories, one being the audio interface acting up (but that
wouldn't explain the stuttering i think), and the other would be ram slowly
going bad (but then i would likely get a kernel panic...) 

Any ideas? It's very hard to trouble shoot this one...