pops and clicks with motu 8pre

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iivanov88

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I bought an 8pre and it's been great for about a month but lately it's been getting really bad dropouts. I am on an intel iMac with tiger. I downloaded the Universal Audio Install driver for the second time and it looks like it went from 1.4.6 to 1.4.7. I had an m audio firewire 410 before and that never ever happened with it. anyone have similar issues?
 
iivanov88 said:
I bought an 8pre and it's been great for about a month but lately it's been getting really bad dropouts. I am on an intel iMac with tiger. I downloaded the Universal Audio Install driver for the second time and it looks like it went from 1.4.6 to 1.4.7. I had an m audio firewire 410 before and that never ever happened with it. anyone have similar issues?
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That's extremely unusual. I just spent twenty minutes searching relevant boards and I've been unable to find any other reports of that happening with the 8Pre on a Mac.... Congratulations. You're one in a million. :D

You didn't provide nearly enough information to give any advice, though. Please answer the following questions:

1. Did this start happening after the update or before?
2. Do you have any other FireWire devices attached?
3. What audio software are you using?
4. Does this happen on playback, record, or both?
5. Do dropouts occur on all tracks or just some tracks?
6. If this occurs while recording, is there a glitch in the recorded track or does it just affect your headphones?
7. Have you installed any OS updates that could have triggered this? Which ones?
8. If this affects recorded content, does this occur on all inputs or just certain ones?
9. If this affects recorded content, does this occur on all mics or just certain ones?
 
dgatwood said:
That's extremely unusual. I just spent twenty minutes searching relevant boards and I've been unable to find any other reports of that happening with the 8Pre on a Mac.... Congratulations. You're one in a million. :D

You didn't provide nearly enough information to give any advice, though. Please answer the following questions:

1. Did this start happening after the update or before?
2. Do you have any other FireWire devices attached?
3. What audio software are you using?
4. Does this happen on playback, record, or both?
5. Do dropouts occur on all tracks or just some tracks?
6. If this occurs while recording, is there a glitch in the recorded track or does it just affect your headphones?
7. Have you installed any OS updates that could have triggered this? Which ones?
8. If this affects recorded content, does this occur on all inputs or just certain ones?
9. If this affects recorded content, does this occur on all mics or just certain ones?
Click to expand...

1. before. the update was an attempt to fix it. I did the update earlier today just before my resort to post on here.
2. no
3. It happens with all the audio out of my computer I would guess. lately I haven't been recording much so the daw I use is irrelevant (but it is live 7), but it happens when I play music in itunes.
4. again, this isn't strictly daw related. I will have a little session maybe tomorrow for the sake of seeing if it does affect playback, monitor, etc. who knows, it may be an itunes problem, but I would guess it's just the general audi output from the computer.
5.^
6.^
7.no
8.^

again, after I play around with some recording, I will answer 4,5,6 and 8. but it seems like it happens to all the audio coming out of my computer.

I'm not an expert, but I have been hearing of these "CPU spikes" and have been assuming this is what is causing it. I have been opening activity monitor and under disk activity see some green and red lines which rapidly go up and down every minute or so. is this what CPU spikes are?
If I go under the CPU tab in activity monitor it's always 90-100% idle. there is always 1-3% under user and system. don't know what this means but have been eyeing it.
 
yeah it's just an output problem as a whole. any suggestions?
 
could something have upset your buffers (although i doubt 32 would be a problem using itune)?
 
this is what worries me about drivers..... you can buy the most solid piece of kit that you can imagine ..but its still a crapshoot because they dont know what is going to be hooked up to it!!!!
 
guitarboi89 said:
could something have upset your buffers (although i doubt 32 would be a problem using itune)?
Click to expand...

where is that changed? do you mean bitrate? in the motu audio setup I can only change the sample rate.
 
can you do a system restore to when it was working fine ?

test it if ok then its something you've installed since then , if not uninstall the drivers unplug the motu reboot install the drivers the ones on the cd and plug the motu back in and try
 
iivanov88 said:
where is that changed? do you mean bitrate? in the motu audio setup I can only change the sample rate.
Click to expand...

That's a setting in the DAW's sound setup or whatever, but doing it in iTunes... that's just weird, since that should be using the default buffer size (big) and is only using two channels at a time.

Try running Terminal and typing

top -o cpu

and hit return. See if something is soaking up... say 100% of one CPU or the other. If so, it will jump to the top of the resulting list. Close the window to quit it when you're done looking.

Failing that, do you see anything in system.log that might indicate something odd going on?

Have you tried contacting MOTU's tech support folks? Worth a shot.

You might also try looking in Audio MIDI Setup and see if anything is weird... and try moving aside the com.apple.audio.DeviceSettings.plist in /Library/Preferences and rebooting. There might be some really bizarre value in there that's causing problems. If so, try comparing the values in the old one with the new one it creates and let me know what the differences are.
 
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