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#1168482 - 10/25/12 12:12 PM Dif-AT24 not recognized by vm-c7100
aero Offline
Space Cadet


Registered: 10/25/12
Posts: 24
Hi guys,

I'm running vm-c7100 os 1.72.

I have a DIF-AT and DIF-AT24 that have been sitting on my desk for 7 years never plugged in. I bought them back when they were still available in case I would need them in the future:) I am trying to use my v-mixer fully digitally to my PC and I need at least 12 channels of output, so I have dusted them off and plugged them in. The original DIF-AT(with T-dif) is working fine, so I can get 24bit out via the tdif into my pc, but....

The DIF-AT24 lights up and seems to send and receive adat input and also output adat to my original model dif-at, but the VM-C7100 doesn't recognize it on boot-up and add it to the list of connected devices. The ADAT light turns green when I give it an adat input source, so I think that area isn't the problem. There is obviously a communication issue between the console and the 24.

There is a "dif-at rescue" routine built into the vm-c7100 but it appears to only address the original DIF-AT. I tried it anyway but it was to no avail.

Anyone seen this before and have any ideas? I feel like I'm screwed, since getting it repaired may be impossible at this point.

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#1168483 - 10/25/12 12:26 PM Re: Dif-AT24 not recognized by vm-c7100 [Re: aero]
aero Offline
Space Cadet


Registered: 10/25/12
Posts: 24
PS: I've tested both cables and R-bus ports and DIF-AT original works fine in every config...
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#1168515 - 10/25/12 03:58 PM Re: Dif-AT24 not recognized by vm-c7100 [Re: aero]
bear Offline
Planeteer


Registered: 10/25/99
Posts: 6813
Loc: abq,nm,usa
I do not have any experiance with this unit - not many around here do I am afraid.

The only thing I can think to suggest is checking your VM-C firmware version - the DIFAT24 is newer and may not be compatible

Roland has version 1.720 on their site



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Edited by bear (10/25/12 04:06 PM)

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#1168561 - 10/25/12 06:00 PM Re: Dif-AT24 not recognized by vm-c7100 [Re: bear]
aero Offline
Space Cadet


Registered: 10/25/12
Posts: 24
Thanks for giving a hand.

You probably missed that I mentioned above that I'm running vm-c7100 system 1.72 already.


Just noticed you are in ABQ. I lived there back in the 90's, I miss it.

Thanks again.

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#1168612 - 10/25/12 08:58 PM Re: Dif-AT24 not recognized by vm-c7100 [Re: aero]
aero Offline
Space Cadet


Registered: 10/25/12
Posts: 24
Mystery solved.

I am waiting for some of my adat gear to get here so there was no way to test it other than to believe what the mixer was telling me, which was that there was no dif-at24 attached.

Then I remembered that I had an ada8000 ad converter in my other room that I could try. So I plugged it in and plugged my bass into it and then sent it thru the dif-at24 to the vm-7100 and it worked perfectly, giving proper levels in the mixer and sounding clean as a whistle. It still is not showing up in the mixer as existing at all on the R-bus, though.


So, what this means is that - even with System 1.72 - The Roland doesn't recognize the DIF-AT24 in software. It will not show up at all as being connected - even though it is working fine.

I am guessing that because the Dif-AT24 didn't exist when the mixers were made, they have no syntax in the OS to acknowledge them, even in 1.72, the last os they came out with. Hopefully everything else is cool and the full 24bit path is preserved, which I am near certain would be the case.

Luckily this mixer is old school enough that it isn't all handled in software internally. Even though it thinks the dif-at24 is not there, my cable is, so it works.

I am guessing that midi in/outs won't work but who knows maybe they will too somehow, not that I need them to.

So for any vm 7000 series mixer owners, unless you have seen otherwise, I think this is how it will always work - classic Roland.

...crickets chirping...

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