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  4. VI SE Freezes in Mac PPC G5 LP 7

  • VI SE Freezes in Mac PPC G5 LP 7

    C
    C
    Since installing VI SE, I get freeze ups at unpredictable times and get an error in LP 7 that reads, " error in audio-midi synchonization " and the suggestions on the Apple LP7 page did not help. This must be a frequent problem as it is in their FAQ list. I updated all software, RME Fireface 800, and cannot understand what is going on. Please help. The implication is that there is a conflict in the sample rates received. I have RME set as the Master. (The installation was perfect as we used the video instruction, pausing it at each step.) I heard that the universal version takes the time to convert the prior mac version actually decreasing efficiency. Does this problem only happen with the non-Intel version which is what I have but upgraded to the most recent LP 7 which is mainly to help the Universal change as I understand it. Any ideas.


    Mac 2.66ghz PPC G5 Current updates for all software including LP 7
    4.5gb ram
    rocstor 160gb 7200 rpm ext hd by fw 800
    RME Fireface 800 with latest update of software

    This now also happens when opening VI standalone and the Audio Midi setup automatically switches to 192 at the start and I have to go back and change it to 44100. My ram was installed by Apple and is 256, 256, 1gb, 1gb, 1gb, 1gb totalling 4.5gb. Could the 256 ram at the beginning be the problem. It never was before. I also monitor with iStat Pro and the cpu usage is low even when this happens. I plan to upgrade to a Mac Quad core 3.0 with 16 gb of ram but I am confused whether that will even be helpful since I read in some posts that only 3.0 gb of ram can be accessed and 64 bit for music is not helpful at this time. This is confusing and frustrating... I read the article by Nick Balzdorf of VI magazine about loading 7 gb of samples but still cannot get rid of the clicks, pops and freezes that happen unpredictably, and did not happen before installing VI SE which I love btw but need it to work reliably. [:(]
  • J
    J
    Hi christofori:

    Can you clarify your computer again? The 2.66Ghz is a MacPro spec, not a G5 PPC spec.

    Here are some suggestions:

    1. Repair permissions using the Disc Utility found in Applications> Utilities folder. Shut down, and reboot.

    2. Double check your RME sample rate settings and follow you digital signal data path to make sure that all components are clocking properly. There may also be some similar settings inside Logic's own menus as a default which may need to be reset.

    3. Make a new Audio-Midi setup configuration

    4. Use L7's setup wizard again

    5. Uninstall and Reinstall the audio and MIDI drives, even if they are the same versions.

    6. Try running a third-part disc utility such as DiskWarrior to repair directories

    Note: *some* people have had problems with OS 10.4.9. I'm not saying this is the cause of your problems here, but it may be something to consider if all else fails.
  • C
    C
    My machine is a Power Mac G5 dual 2.5 ghz and 4.5 gb of ram. So far I have repaired permissions, reinstalled audio software ( RME FF 800), done the LP 7 startup wizard again, and checked the settings but nothing works to stop the freezes but the clicks and pops are gone. It seems to be the RME because it works fine on the built in audio setting. I do have the Mac OS X.4.9. This is very frustrating. [*-)]
  • J
    J
    It really sounds like you are doing all the right things so far.

    It may not be your RME, exactly, although your RME is showing symptoms that your built-in audio is not. One of those issues may be due to firewire data clogging.

    Try to get a PCIx firewire host card for your G5. That way, you can avoid some of the firewire bus overloading that was often reported on the G5s. If you are running more than one device on *any* firewire port (400 or 800), it doesn't matter because all the ports on your computer (same as mine) feed data into a single bus. The firewire host card will add a separate bus for other firewire devices so that those devices would not compete for bus bandwidth on the built-in firewire ports on your computer.

    Is there any way to do a test project with samples running from a second internal SATA with all other firewire devices disconnected (assuming you have them)? The performance on an internal SATA will likely be better than on firewire.
  • C
    C
    Dear JWL:

    We thank you for a suggestion that made sense. I did not know that because I had the Fireface 800 connected to the FW 400 port and the Rocstor HD with the VSL SE library connected to the FW 800 port that they shared the same bus and obviously VSL does not like to share. When I hooked the Rocstor up to the USB port and left the Fireface 800 alone on the FW 400 port, end of pops, and end of sound dropouts. Now I am kickin it. Many, many thanks. [:D] [[:|]] [H]
  • J
    J
    last edited
    last edited

    @christofori said:

    Dear JWL:

    We thank you for a suggestion that made sense. I did not know that because I had the Fireface 800 connected to the FW 400 port and the Rocstor HD with the VSL SE library connected to the FW 800 port that they shared the same bus and obviously VSL does not like to share. When I hooked the Rocstor up to the USB port and left the Fireface 800 alone on the FW 400 port, end of pops, and end of sound dropouts. Now I am kickin it. Many, many thanks. [:D] [[:|]] [H]


    [[:P]] [[:P]]

    Congrats, cristofori!

    Firewire bus clog strikes again!!

    You *should* be okay with the Rocstor on the USB. Just be aware that at times the USB trasnfer rate will drop because USB drives cannot sustain their optimal transfer rates the way that FW can.

    But, the value of having two separate busses is priceless.
  • C
    C
    Any recommendations on what product (PCIx card) to buy? Also, I am thinking of buying one of the new Mac quadcore computers with 3.0 ghz and 16gb of ram with the idea of putting all my stuff on one machine. Another person has posted a severe clicks and pops problem using 2 internal SATA hard drives on a Mac Xeon system. Can there be conflicts between multiple internal hard drives similar to the fire wire data clogging problem? Presently, I use a WinXP PC via midi-over-lan to hook up with my Mac dual so I can use Gigasampler by external setting on LP 7. Now everything is working great.

    Thanks once again for identifying the bus issue. [:)]
  • J
    J
    Hey Christofori:

    The Intel Macs are certainly more powerful than the PPCs, but please be careful about any ideas of how much can be run on it. The amount of RAM is only part of the equation.

    Once you get to 4GB, you've reached a certain limit-- some of the same restrictions apply on the Intels as they do on the PPCs. It's because today's applications are all coded for what is called 32-bit threading. That means that the absolute maximum and single application can address is 4GB.

    OS 10.5 (Leopard) seems to be inspiring developers to break that barrier, but it will be a while before applications go to 64-bit. Such benefits of 64-bit threading include the ability to access a whole lot more than just 16GB of RAM, theoretically speaking.

    Right now, I have a 3G with 8GB installed and will wait until later to max it out. I don't think 16GB will make much of a difference in performance under Tiger to justify the price of RAM these days. The benefits of running standalone instances or running a second host on the same computer dwindle as all applications compete for the same CPU and data cache processes. 16GB doesn't necessarily mean 4 times the computer power.

    There is a thread here somewhere that posts specs on what can actually be run on a MacPro using VI instances. I'd say that 15-20 healthy matrices (regardless of how many instances are used for them) would be a modest estimate on a 3G. Some are getting more than that on the 8G.

    Also keep in mind that with a MacPro, you will run out of usable "voices" before you ever begin to max out the CPU.

    As for PCIx cards: Sonnet has been pretty reliable, and their customer support is great. $40 USD for a three-port host card:
    http://www.akumen.com/product/240/

    You might also want to visit Sonnet's site for more options:

    http://www.sonnettech.com/product/computercards/index.html

    Cheers!