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Friday, August 28th 2009, 2:19am

Odd/Even midi channels

Trying to set up my new Virus TI in Logic (9) and I'm having this strange behavior - hoping someone can shed some light. The unit only generates sound on odd midi channels (1,3,5 etc) while even channels (2,4,6 etc.) make no sound. I can see them all receiving midi in the monitor section. This is just with init patches, before any actual patches are loaded.


Friday, August 28th 2009, 2:41am

Same thing in the tutorial song, btw.


Friday, August 28th 2009, 2:44am

also (sorry - haven't found how to edit posts), I installed the latest OS 3.1.0. No change.


Friday, August 28th 2009, 3:53am

This is just bewildering. I'm using the tutorial song to try and get my head around what's going on and it's not making any sense to me at all. Firstly, the behavior I mentioned above is still present, so I'm only hearing half the patches. Next, they're not actually playing when the transport is rolling, despite the monitor section displaying midi activity on all tracks. I can play the sounds (that is, those on the midi channels that will sound) when the transport is still, I can even record note/automation data and see it when the transport is rolling, but no sound. On top of that, when I engage Live mode the Ti stops making any sound at all.


Friday, August 28th 2009, 10:59am

you might be able to solve the problem by removing the powercord from the virus, wait for 10 seconds and put it in again.

best, marc
The official Virus TI facebook page: http://www.facebook.com/accessvirus


Friday, August 28th 2009, 8:37pm

I ended up re-initializing the unit, which temporarily solved that problem, but it's back, and there are plenty of others too. There's no predicting whether the TI will actually be available in Logic (sometimes it just doesn't show up and I have to restart Logic. Or the TI. Or both. Again), I've had it scream a loud digital distortion at me several times. Sometimes it will play the song, but just random notes, and not in time, and notes played on my midi keyboard will sometimes trigger sometimes not. If I introduce a tempo event to the session it will crash Logic. Currently it's back at the odd/even play/no play state, and I barely have the energy to go through the whole re-init process.

Is com.amv.sage the prefs file for the TI?


Saturday, August 29th 2009, 2:37am

What other USB devices are connected to your setup exactly (besides the TI and mouse/keyboard) and at what audio buffer size are you running Logic exactly? (you can check this in Logics "Audio" preferences)
Also check the "process buffer range" on the bottom of the same audio preferences panel in Logic.

Best wishes,
Joerg Huettner


Saturday, August 29th 2009, 4:24am

Process Buffer range is small, and the behavior is the same using any buffer size from 64 to 512. I'm suspecting the same thing you suggest - that the USB simply has more than it can handle. There's a midi interface (Motu Express 128), Frontier Design Tranzport, passive hub w. iLok (and a couple of other dongles) and a Novation ZeroSL all connected to the MacPro. The TI is connected directly to it's own USB port.


Tuesday, September 1st 2009, 12:46am

bump. anyone?




Tuesday, September 1st 2009, 1:04am

When this is happening, take a look at the LFO LEDs - does one of them appear frozen or constantly lit?