Posts by skittb123

    Just wanted open this thread to spare you the time & money of investing in an expensive audio interface, in order to use your Virus TI2 with MacOS Catalina.


    I personally have invested in a rather expensive audio interface: The Presonus Quantum2626. It’s based on Thunderbolt 3 and it’s actually the fastest interface available on the market atm, and has amazing sounding converters.


    I bought it so I could use the keep using the Virus TI plugin on MacOS Catalina, by utilizing the Analog Outs of the Virus TI2.

    I’ve actually got the buffer size of my setup down to 32 samples, which has a round trip latency of 1,8 ms.


    This is a latency I’m willing to accept. If only it was that easy.


    After extensive testing I can definitely say there is absolutely NO WAY you can predict what the latency of the Virus TI2 is going to be at any given moment. One moment it’s actually 1,8 ms, other moments it’s 200 ms. Because this fluctuation I can’t even use the Quantum2626 for exporting the Virus’s output, since the timing is all over the place, even within one export.


    Before you ask, this is not only a happening with my Quantum. I already owned a few simple Beyerdynamic and NI interfaces and they give me exactly the same problem. (with even worse timing). It’s also not my Mac. I own two brand new 2019 Macs & I’d be amazed if they weren’t up to the simple task of streaming and recording 3 stereo outputs of my Virus TI.


    All in all, even if you get the audio streams working, musically it's just not going to work because of the timing problems.
    would the Virus have a steady latency that doesn't fluctuate, this wouldn’t be problem, but the sheer unpredictability of the timing makes it completely useless.


    so, if you're on Catalina and hope to get your Virus TI working by investing in an expensive audio interface, spare yourself the hassle. It won't work.


    All we can really do now is hope and pray for Access to come with an update.


    Marc I sincerely hope we can at least get an update on the situation. I think for most of us it can be comforting to know wether Access is working on it or not.

    The solution is simply but it can only be done if you have Logic Pro 10.4.8.


    Delete: User --> Library --> Caches --> AudioUnitCache


    Open Logic Pro 10.4.8 and let the Plugin Validation do it's job.


    Then open Logic Pro 10.5 and don't ever touch AudioUnitCache again.


    Make several backups of your AudioUnitCache file if possible.




    Getting Logic Pro 10.4.8 is a different story though. I accidentaly upgraded to 10.5 and did not have a backup. I've actually been on the phone with Apple for almost an hour and they simply couldn't give me a simple download link to 10.4.8. What I did was download 10.4.8 from a torrent so I could run the Plugin Validation and then open my legit version of LPX 10.5 again.. ridiculous but the only solution for now..

    Just discovered that activating Live mode fixes the problem of the lag with the Virus responding to Midi when using Catalina and Logic Pro X. I confirmed that the timing of the recorded midi data is good. Virus is now usable for me again using audio outs instead of usb audio. Would still really, really appreciate getting updated software from Access that is compatible with Catalina.


    That's great that it works for you, but the Analog Outs don't have PDC (plugin delay compensation) due to hardware limitations (confirmed by Access), so you're still left with a fluctuating lag when using Live mode.


    The best I got with MacOS Catalina is a lag fluctuating around 13 ms, but this changes every other count, so you can't rely on it. That's the most annoying part. What delay times are you getting and what's your setup if I may ask?

    No offence - but you couldn't be further from the mark with your hypothesis around "old chips" and "low level machine code" support. It doesn't work that way.


    A higher-level language (such as C++) compiles down to processor byte code - it's not about the processor supporting e.g. C++ - it's about the higher-level language supporting compilation for a particular processor.


    Anyway - as I understand it - the issue here is Access relied on a 3rd party for the OSX driver / USB audio integration code. It's dependent on that 3rd party making available a new release of this code for Catalina. Once this happens they are then reliant on finding a resource who can integrate this new code into their Mac Virus code base - and this in itself is a fairly big task end-to-end and they are looking to hire (maybe).

    no offense taken. That makes sense.

    Still, as I see it now, we probably won't see another release until months after that vacancy is filled..

    I have some words back from Ploytec:


    In short they said that Access Virus GmbH already has the new driver code for some time now. It's would only be a matter of time before they would release the macOS Catalina drivers.


    I am the first to admit I was wrong about my above statements. It was my poor judgement and lack off information that made me think Access Virus GmbH wasn't working on the future of the "Virus Ti".


    That's interesting. I don't think your first hypothesis was that far off the mark though.


    If Access actually had the driver code for quite some time they would have had the driver finished by now..

    so maybe they can't find the right man for the job within their budget?


    I'm not a coder myself but from what I've gathered is that because the Virus TI chips are very old, they only support low level ''machine'' code.

    Since most modern chipsets support higher level code languages like C++ It's probably very hard to find an old school programmers that can do low level coding, and if there are, they're probably quite expensive. So maybe Access isn't willing to spend as much, but publicly they don't want to burn the bridge just yet since that will hurt the sales.

    ''We do not have any updates in regards to macOS Catalina compatibility at this point. Once we have news we will certainly post these as these soon as available.


    We in general do not comment on future developments.''

    Yep, very striking how they turn defensive as soon as you ask about an update.


    ChrisCabbage Nevermind, I got it working by dragging the VST and AU files from an old Mojave volume. It's very buggy though, and the timing issue is still there, so for now the Virus Plugin is still the best option.

    Any updates?


    Ploytec driver for MacOS 10.15 (Catalina) is out, but no update from Virus them selfs? I don't mind that they are still working on it, but a little open communication and honesty would make a big difference. Maybe they need to buy a new license for de Ploytec driver and don't want to-do that? I am willing to pay a fee for a new driver update.


    I pity the people who just bought a new mac and cannot downgrade to Mojave to make use of the Virus. The Virus TI2 is still sold.


    I own a 16 inch MacBook Pro which can't be downgraded to Mojave. Simply does not work. My Mac mini 2018 stopped supporting Mojave too last week. Running Mojave on it now causes the machine to crash during sleep and this is a risk I'm not willing to take. I'll be the last to say that's not Apple's fault, but at some point we are all stuck with Catalina. Technology is moving forward.


    About the Ploytec Licence. I personally wouldn't even mind if we all would have to pay a little for a new release. Maybe €99,- for a software update and include it for free with every Virus TI sold right now? Marc Would that be an idea?

    By trial and error? Start with all the buffers within your setup at the same amount of samples, and see which combination works out the best? :/ (You know, audio interface at 128 - virus at 128, audio at 256 - virus at 128 and via versa...and so on..) Who really knows in which way a particular daw should be set up in/and with a particular hardware.

    Yes I've tried everything between 1024 and 64.. Either Logic Pro X's midi is just way off or it's the Virus..

    Here is some interesting reading why that might happen, https://www.gearslutz.com/boar…-crimson.html#post9852296 the part about core audio and bit accurate drivers. It does not however offer any solutions for your timing problems, but maybe some further information how to avoid it.

    Interesting read, but the Virus Bit Accurate driver is not available on MacOS Catalina unfortunately..

    Is the "timing issue" something like this? (As I am starting to be completely out of the loop what is being complained..)


    About Cubase for example (its slightly old, things tend to change to better over time, but..yeah :/):


    "For instance, if you play regular 16th notes at 120bpm, each note will occur at an interval of 125ms, but when a soft synth is played 'live' through an audio interface with a buffer size of 5ms you'll perhaps hear them with spacings such as 125ms, 125ms, 125ms, 130ms, 120ms, 130ms, 125ms and so on, where occasional notes get shoved into adjacent buffers.

    That's exactly it! But raising or lowering the buffer size makes literally no difference... So what now?..

    Contacted Access about the timing issue. here's what they had to say:


    ''When using the Virus TI plugin and using the analog outs, this cannot be delay compensated by DAWs due to technical restrictions in general. There is also no setting that would influence this at all. You can try to see if using different buffer sizes might help, but again the signal from the analog outs cannot be delay compensated in general with the plugin being in use (and this never was the case.''


    So basically there's nothing we can do to fix the timing when using the analog outs.