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Old 12th May 2009, 08:19 PM   #1
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Question Simple RBUS/TDIF/ADAT ADC/DAC

Hello

I would like to build a simple ADAT or RBus or TDif 8 Channel ADC/DAC. It needs to operate at 24bit 48kHz or above. I need 8 channels of i/o, but they can just be at line level.

I believe that RBus and TDif are the same protocol just under different wirings. Is it also true that the pins ie 1/2 in carries the signal over SPDIF? In which case is there a very simple SPDIF ADC/DAC for 2 channels that I could have 8 copies of?

Whilst I've got quite a bit of electronics knowedge, I've never done anything like this before.

A diagram of the ideal situation is attached. If you would like any more info please message me or reply.

Thanks very much!

Guy Joseph
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File Type: jpg vfire.jpg (60.4 KB, 201 views)
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Old 12th May 2009, 10:41 PM   #2
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There are soundcards like Lynx aes16 , or Rme AES ...
Those basically contain 8 pieces of Spdif RX/Tx , hence 16in 16out.
The challenge is to feed back some good external local clock that makes low jitter conversion possible, and the host (PC ) is slaved to that.
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Old 14th May 2009, 07:05 AM   #3
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Default RE: Lynx AES 16

Hi

Thanks for a quick reply. I already have the interfacing between the PC and the TDIF (The V-Fire that I have). What I need is something to convert from line level inputs to the TDIF inputs and outputs on the V-Fire.

Thanks

Guy
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Old 14th May 2009, 07:18 AM   #4
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hm , interesting , can you open it for a quick look under the hood ?

-Maybe its a TC Dice2 chipset you can buy for cheap...
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Old 14th May 2009, 07:35 PM   #5
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I see original MSRP was 400 usd and it comes from 2006. Then its safe to presume its a DICE2 chipset. That is quite straight forward cause they use plain i2s / aes ebu pins then. You have documentation for the roland connector ?
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Old 17th May 2009, 08:30 AM   #6
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Default RE: Roland connector

Hi

Thanks for your thoughts.

I don't have any documentation for the R-Bus connector, but I know that it is simmilar to TDIF (people have built simple adapters for the two before...)

A lot of it is here: http://tascamforums.com/index.php?showtopic=14518

Thanks

Guy
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Old 16th February 2011, 07:15 AM   #7
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Did you ever realise these converters? I am the one who posted all the original documentation... So I wonder.
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