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> Motu Ultralite Serious Cpu Issues!
aeccoin
post Mon 4 Jun 2007, 07:32
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I'm using a macbook pro with the OS X 10.4.8 (as i hear it's better for audio than 10.4.9) and I have SERIOUS CPU issues with the MOTU and Cubase SX 3. When I have the sample rate low, recording is fine, HOWEVER the second I add ANY kind of processing (even crappy built in equalizers in cubase) the CPU goes off the wall! I have to change the sample rate to 512 from 192 and even then the CPU is at about 80% and I'm only running 3-8 audio tracks (that's right not even MIDI, not to mention half the tracks are frozen) with very minimal processing. If i add about 3 different processing items (e.g. a compressor, equalizer and some reverb) the CPU goes so insane that my audio is inaudible and I have to up the samplerate again, this time to 1024 !! THAT'S INSANE. Even then the audio is barely audible and I just don't know what to do. I've done all the troubleshooting I can think of and nothing works.
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warpmaster
post Wed 6 Jun 2007, 17:32
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Ah, I see.


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deaconblue
post Fri 8 Jun 2007, 05:29
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aeccoin,

The ultralight should have come with a copy of Audio Desk 2 (and your MacBook Pro should have come with iLife '06). If you use either GarageBand or Audio Desk do you have the same issues? If not, the problem is going to be with the behavior of Cubase under Rosetta on the Intel proc in your MBP. I am not certain if Audio Desk is UB yet, but Garage Band is, so that will remove the Rosetta issue for you.

If your issues persist outside of Cubase, we'll need more info to be able to offer any help. How much RAM do you have on the MBP? If if is less than 1GB (I'd really recommend at least 2GB of RAM on the Intel Macs) then the CPU spike might be considered 'normal' since you have no 'work space' to play with. Up your RAM to as much as you can afford without resorting to sleeping on the park benches and then go from there.

How much free Hard Drive space do you have? If it is less than 10% of your total drive capacity (i.e., 10GB free on a 100GB HDD), clear off some unused applications/files so that you have adequate room for the Virtual Memory Swap File that is going to come into play to make your machine more efficient.

Hopefully this will help. Best of luck. Post back with any info or results (hopefully positive ones).

peace.


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