Hi i noticed there was a similar problem brought up in the past... but i'm hoping there maybe some updates....
i run logic 6.4.3 on G5 macosx 10.3.4 with a motu 828 (not mkII) with the latest driver dowloaded from their site.

all of a sudden one nite i got "core audio selected driver not found (-10202)" - ive reinstalled logic+the 6.4.3 update+the motu driver nothing worked. the next morning everything is as it has been for years but after few hours this highpitched sound cuts in from the motu hardware and the driver is 'not found' again and core audio is not functioning.
this has happened a few days running now. just now it appears that if i powerdown everything for longer than, say, 20 minutes its all working again until a few hours after that the highpitch sound thing again.

(this maybe just a coincendence-- but it first happened shortly after a NI guitar rig2 demo version ran out (with no warning-just loaded up a song and "guitar rig2 not found" came up - i tried to re-load the demo version which was probably dumb - but i didn't expect major repercussions from doing that) could this have caused a bug? i have since ordered the real version in the hope it might fix things.
i'm now thinking the motu828 has got some kind of erratic problem and needs to be replaced?

hope someone can help, i am totally freakin out as i have just stared a business doing advertising music and the deadline's are sooo tite!
regards,
Ewan

Try as on this thread

I'd zap the PRAM as explained here (keep the keys as to hear the start up sound at least 3 times) and make a motherboard reset too in case (we'll see that later).

Read this too

First thing should be still to start from the install DVD of OS X and run the disk utility to see if everything is fine in both the drive and permissions. Then run OnyX to clear caches, temps files from the system (in cleaning, the lowest 2 "rows" of checkboxes on 4 save the Mail stuff, not necessary).

Hi, thanks for your reply!

it seems for the moment that doing the disk utility thing and clearing cache and temp files via onyx, then reinstalling the motu driver after that, did the job. so thanks v much much for that info!

By the way... zapping the PRAM and resetting the motherboard sounds quite severe... does that disturb any/many programs,files or settings i.e. logic and related registered plug-ins etc. etc?

cheers,
ewan :-)

Hi all, pitched sound out of the motu is a known problem. Can be fixed by moving the red voltage swith on the side of the motu a couple of times. Please unplug the mutu first. And restting the motu. And makin sure you have the latest drivers. hope this helpes.

hi thanks, but i'm afraid this didn't have any effect. and i have the latest installer. the problem keeps coming back now, randomly everytime i try to use it.
some more things that are happening:

"An OSErr error has occured.0- File I_FWAduio.cpp" error message has happened a few times.

also when i turn on the unit. sometimes the SPDIF IN light is blinking rapidly and the DIGITAL OUT light is on constantly - even those neither connection is used or connected

motu doesn't seem to be answering its emails which sux too. ive called in a technician andf will post any developments, seeing as others are having similar problems.
thanks
ewan

ok did you reset the motu?

i'm not sure what resetting the motu entails, if indeed the original 828 has that function?

i've since been able to get the unit working on my laptop, with no problems, so i 'think' i've ruled out hardware failure... which is one step closer

but my desktop G5 will run fine for 20-30 minutes now and then the motu will cut into the hihg pitch sound and motu ceases to be recognised, almost like clockwork. and then it wont work again at all for that day.
there' must be some malfunctioning antipiracy demo file or something fooling with the system (an uninformed guess)
i've run diskutility, onyx etc but it's obviously not finding the file/program in question, i fear wiping the entire hard disk or something will be the eventual outcome....

got any tips on folders that i can check for timed-out demo files and related documents??
i've searched the harddrive for any files with "guitar rig V1"(the presumed offender) in it but i'm sure there are others related to the demo but not obviously named.

i have someone coming over on wed, to have a look.

thanks for the reply!
ewan

The first link I gave has in it the reset recipe, it's simple and is safe.

As is safe zapping the PRAM. Resetting the motherboard is safe as long as you make things calmly and do exactly as said (on the static electricity removal in peculiar).

The folders you should check for you bad demo hypothesis are:

~/Libraries/Audio/
~/Users/yourusername/Libraries/Audio/

Check also in the system preferences in the Accounts what's checked on start up.

sorry, with the motherboard resetting, i cant find any any link? can you post it?
i have already reset the PRAM, with no effect. altho when i load up logic sometimes it says the date is set a week earlier.
cheers,
ewan

I HATE when Safari eats my answers… I HATE that…

The Official Apple document on PRAM and NVRAM and their reset

The Official document on resetting the SMU on G5

Note, the procedure is not the same on macs before the G5 or laptops (you reset then the PMU (laptops) or the CUDA (pre-G5))