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TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

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TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 6:19 pm

Hey there, so in realising i could re-jig some of the equipment round, i realised i could move one of my MOTU 2408's over to where the modular is, for an extra 8 inputs to my DAW from the modular. Great..

So i connected the two synths that WERE connected to that 2408, up to my MAIN 2408 via a TRS to TASCAM/TDIF cable. Now i get no audio showing up on the main 2408 interface at all fthrough this TDIF cable. Have checked wires, all connected correctly.
Have checked all software, all inputs are enable too.
Have i bought a TDIF cable that somehow doesn't work with the 2408?? It's very annoying!

Anyone have experience connecting these up?
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 6:23 pm

https://www.ebay.co.uk/itm/AudioKraft-2 ... 2749.l2649

This is the cable i bought for the job, whic states it should work, being the tascam standard.

And this https://www.soundonsound.com/sound-advice/q-which-db25-cable-do-need is the guide i used!!
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 6:36 pm

Oh no. It;s not an analogue to digital converter is it.

Shit.

How might i go about this then? I've used the 8 analog INs on my 2408mk3, and i want to input more... Anything i can do?
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Hugh Robjohns » Fri May 22, 2020 6:39 pm

Michael Dow wrote:So i connected the two synths that WERE connected to that 2408, up to my MAIN 2408 via a TRS to TASCAM/TDIF cable.

Oh dear!

Well, that's not going to work... not even slightly!

Point 1: TDIF is a digital interface format. It wants a specific -- now very obsolete -- set of digital input signals. It won't work with analogue signals from your synths.

Point 2: Although it's not going to matter to you at all, for the benefit of others, the TDIF connector does use the same 25-pin D-sub connector as Tascam's analogue and modern AES3 digital interfaces (both now embraced as the AES59 interface)... but it's wired up completely differently.

Now i get no audio showing up on the main 2408 interface at all through this TDIF cable.

No, and you never will, I'm afraid!

Have i bought a TDIF cable that somehow doesn't work with the 2408??

No, you've bought an AES59 analogue breakout cable which will never work with an obsolete TDIF digital input connector.

If one or more ADAT ports on your interface are available, then an alternative way forward might be to buy an ADAT-equipped preamp, such as the Behringer ADA8200, and use that to convert your analogue synth outputs to the ADAT digital format, and then use a lightpipe connection between the preamp and interface. If you went for the Behringer you could also make use of its outputs if you needed additional sends. If you don't need more outputs, there are plenty of other good ADAT-equipped preamps around.

Hope that helps.
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 6:45 pm

Thanks Hugh. yeah after a while of headscratching, not long after i posted this i realised. Thankfully i went for the cheap £30 cable as opposed to the £100 van damme alternative i nearly went for!

Feel a little silly!!
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby ef37a » Fri May 22, 2020 6:50 pm

on the bright side! (cough) that cable is good value. I could barely buy the connectors and cable for 25 quid let alone get a drinkypoo out of making it...which WOULD take some time!

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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 7:11 pm

ef37a wrote:on the bright side! (cough) that cable is good value. I could barely buy the connectors and cable for 25 quid let alone get a drinkypoo out of making it...which WOULD take some time!

Dave.

haha, it is a super cheap cable, so i'm not too fussed about the dosh (a little annoyed that i didn't properly think it through before hand!) Maybe i will be able to ebay it for 5 quid or so....
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Hugh Robjohns » Fri May 22, 2020 7:42 pm

Or... You could hang on to it and buy an Audient ASP880, and then use it to get the synth inputs direct into its A-D stage, while still having eight great mic preamps available at the press of a button (or eight!) :-)
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Ramirez » Fri May 22, 2020 7:56 pm

:headbang: Sorry. Edited misjudged post :headbang:
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Hugh Robjohns » Fri May 22, 2020 8:20 pm

It does break the forum rules, and I don't think it would help the OP anyway!
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Ramirez » Fri May 22, 2020 8:46 pm

Hugh Robjohns wrote:It does break the forum rules, and I don't think it would help the OP anyway!

Sorry, I’ve edited the post now.

But it would have allowed the poster to get analog signals into the MOTU’s TDIF inputs, no?
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby James Perrett » Fri May 22, 2020 9:34 pm

A Tascam DA-88* would also give you 8 extra inputs via TDIF - and your cable would come in useful as it would allow you to use the balanced inputs on the DA-88 which are not otherwise available. There are probably quite a few with non working mechanics that could be pressed into service.

*(or a 38, 78 or 98)
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Hugh Robjohns » Fri May 22, 2020 10:18 pm

Ramirez wrote:Sorry, I’ve edited the post now.

No problem, and thank you. I realised you were just trying to be helpful. That's why I didn't delete it straight away.

But it would have allowed the poster to get analog signals into the MOTU’s TDIF inputs, no?

Well yes, technically... If he didn't mind filling his room with a huge obsolete digital mixer just for eight input channels... And he would have had to buy some real TDIF-TDIF cables from somewhere! :lol:
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 11:43 pm

Hugh Robjohns wrote:It does break the forum rules, and I don't think it would help the OP anyway!

Oh man i wish i saw what this was now!

That audient is a beautiful piece of gear for sure. But i have 3 MOTU 2408's already. I pretty much never use a MIC input and if i do it goes through my Drawmer 1960, which i mostly use now with my SH-09 (an incredibly beautiful pairing). Just growls so nicely when pushed!
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Re: TRS to TDIF - No audio sending/receiving.. MOTU 2408MK3

Postby Michael Dow » Fri May 22, 2020 11:49 pm

And yes i know the MOTUs are SO old now (ive got a mk3 and two mk2's) but really, who can tell! (you probably) but nobody on the "dance floor" :bouncy:
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