Hello friends!
I love my Virus when it runs, but am having some serious troubles which kill the vibe just when I'm full of fire to make a track ..
right when i fire everything up ..
I will try and list the symptoms as well as their surroundings as accurately, yet briefly as possible:
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relevant equipment:
-iMac, Mavericks 10.9.3, thus 64 bit
-Ableton Live 9
-RME Fireface 800 Soundcard
-Virus TI-2 desktop
--OS 5.0.8.00
--Control Version 5.0.8.00
--Audio Driver/Library Version: 3.0.2.12
--Host Interface Version 3.0.2.12
--MIDI Driver Version 1.7.0.0
The Virus is solely connected via USB, directly, no hub,
still getting the root hub warning, but i read on the forums here to ignore it and get on with life, which i have been doing.
My settings on Ableton:
--48khz
--buffer: 512
-relevant MIDI Settings on Ableton:
--Input: Virus TI (MIDI) / Track ON / Sync OFF / Remote OFF
--Input: Virus TI (Synth) / Track ON / Sync OFF / Remote OFF
--Output: Virus TI (MIDI) / Track OFF / Sync OFF / Remote OFF
--Output: Virus TI (Synth) / Track OFF / Sync OFF / Remote OFF
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i do a mix of restarts when symptoms occur, none seem to work better or worse though, but :
--POWER ON/OFF
--killing power at the plug
--reloading the VST
--reloading as AU
--reloading the project
--loading a new custom initialise project with Virus already set up
--every now and then i also used to follow the 'No Virus TI can be found' instructions which pop up every time i disconnect or switch off the device,
--e.g. disconnect, wait 30 sec hold ARP EDIT of 10 secs etc, but i stopped doing that since it also is no guarantee that it will work but the most time-consuming..
I have also once uninstalled the Virus Control Plugin and re-installed it
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then I randomly get one of the following scenarios after each restart upon triggering a note on the Virus via Ableton:
-Scenario 1:
--no sound
--Virus Control Plugin shows in the Voices menu on the left that sound should come through, however the channel in Ableton remains stumm
-Scenario 2:
--no sound
--i can see that the MIDI signal is arriving at the Plugin via Ableton, though no sign of life in any way from the Plugin itself
-Scenario 3:
--sound can be seen coming out the plugin is not audible
--the plugin on the channel in Albeton shows an output (sometimes it is responsive to note on/off, at other times it remains constant) - The Channel on Ableton where the plugin resides shows no output.
-Scenario 4:
--quiet sound can be seen coming out the plugin but at normal Monitoring Volume hardly audible
--when i turn up my monitors all the way i hear a faint, very distorted signal, possibly a version of my preset on the voice thats being triggered
-Scenario 5:
--distorted sound
--presets seem to load since i can hear a resemblance of their timbres when i switch through my presets .. although they are terribly distorted
-Scenario 6:
--distorted sound, no note-release
--same sound as Scenario 5, but the notes are on hold, so when i release the key, or the midi trigger ends, the note is not being released.
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Sometimes the Virus springs to live after 2-3 tries, sometimes it takes a perceived 500 restarts at waiting times of up to 15 mins ..
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Some important information for locating the source of the problem:
The same problem occurred on a Virus TI (1) Polar keyboard edition which i had bought around 2009 second hand in the UK ..
It took me until 2012 until i started using it fully integrated, but then the same behaviour was present right away.
Since it was a second hand machine i banked on the fact that if i got a brand new TI-2 the problems would resolve naturally ..
I have also switched computers and OS from a MacBookPro/SnowLeopard to the iMac/Mavericks ..
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Two different Computers, two different Tis and the same problem occurring logically leads to the conclusion that the problem is somewhere in my settings, not any hardware.
I hope i haven't forgot to mention anything..
Thank you very very much in advance, I am certain with the help of this forum full of people who know whats good for them we'll get this baby running smoothly in no time!
I owe you already for having read all this 
Cheers,
Adrian