Virus Ti Click/Glitch (Audio Example)

    Hi,


    I have noticed that my Virus Ti desktop has been making odd clicking sounds and am wondering if anyone could help me solve this?


    The actually unit is fine, its only when I have it running with the VC plugin in logic when it starts to click? I was wondering wether it was something to do with the clock sync but was sure I read somewhere that if your using the VC plugin that syncs it up for you.


    My setup is pretty simple and is as follows...
    The Virus is set as the I/O
    Midi keyboard going into the Virus MIDI in
    Virus Connected to computer via USB
    Running Logic 9.1.6
    Mac OSX Lion 10.7.4
    I/O Buffer: 128


    Here is a video I have also uploaded to give an audio example of the problem. This is just using the filter on the INIT patch, however it also does it on all the other patches I've tried so far.


    http://www.youtube.com/watch?v=bakl-dZ6AkI


    Edit: From what I can tell it always seems to happen around 64 as the cutoff value. And also when tweaking other parameters


    Thank for your help!

    Increasing your overall I/O buffer might help. If not then it seems to me like you have a USB bandwidth issue, it has nothing to do with any specific knob you tweak. You just have to find the best USB port for the Virus, so try all of them. Consult the System Profiler utility to make sure that the Virus has no neighbours on the USB root hub, and disable unnecessary onboard USB devices such as camera and IR communication if needed.

    I have disconnected everything from the back of my iMac apart from the Virus Ti (even disconnected USB keyboard). I then everything up, put the Virus plugin on a channel in logic and now get the following error message...


    "A device called 'BRCM2046 Hub' sharing the same USB root hub with the Virus Ti has been detected. This is a potential problem ad might cause sync errors and audible artefacts when using Total Integration. Try to solve this problem by using another USB port instead.


    (Root hubs are usually inside your computer and therefore cannot be recognised easily as hubs. Trying out other USB ports for the Virus TI might solve the problem. By changing the USB layout and hitting the Rescan button you can evaluate if the problem persists."


    I have tried all 4 ports on the back of my iMac.
    Here is some more info on my setup if its any help.


    iMac 2009 i5 2.6Ghz
    12GB Ram
    Virus TI software & firmware is the latest stable version (4.5.3? cant remember the exact number)


    After a quick google I read the the BRCM2046 Hub is something to do with the bluetooth. The only bluetooth device I am using the an Apple Magic Mouse, my keyboard is the USB version.


    So yes I would say this is definitely some sort of USB problem, or audio sync issue. Any ideas?


    Thanks again :)

    In this case your options are either (1) to find another solution for how to use a mouse (one that doesn't involve a different USB connection that will upset the Virus), and then disable the blutooth adapter. (2) upgrade your sysem with another USB (preferably USB2.0) hub (such as a PCIe adapter although I wonder where it would fit in an iMac - see picture). (3) connect the virus through an external USB hub, preferably one that is based on a multi-TT chipset.
    [Blockierte Grafik: http://guide-images.ifixit.net/igi/UZQRO2ARtsvgaDkP.huge]