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dc cables for silent way resource thread
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Author dc cables for silent way resource thread
Matos
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PostPosted: Wed Sep 28, 2011 10:08 pm    Post subject: dc cables for silent way resource thread Reply with quote Add User to Ignore List

okay, since sometimes things are not as clear as they seem I'm putting together this thread to help all us silent way new jacks to get our glorious hustle on.
so, if you have a dc coupled interface but are confused by the cable issue, this might help. if anything i post is off, let me know.
so as you know, normal stereo cables wont work as outlines in the manual. See below...
Quote:
In general special cables are recommended when using a DC-coupled audio interface as a source of CVs. Most audio interfaces have balanced outputs (on TRS ('stereo') jacks or XLRs), while synth CV inputs are unbalanced (usually on TS ('mono') jacks or minijacks). If you use a regular stereo or mono jack lead, you'll be shorting out one of the balanced output signals (usually the R (ring) to the S (shield)). While this probably wouldn't be a problem for normal audio use, when outputting the sustained voltages that are useful as CVs you risk damaging the interface hardware.
The usual recommendation is to make up special cables with a TRS jack at one end and a TS at the other, connecting T->T (tip to tip) and S->S (shield to shield) while leaving the R (ring) floating i.e. unconnected.

An alternative is to wire a TRS jack to two TS jacks, connecting one T->T/S->S and the other R->T/S->S. This then gives you two copies of the output CV, one of them inverted, which is particularly useful from LFOs. Note that this cable configuration is identical to that of a regular "Y" audio insert lead.


so, to buy premade cables of awesomeness, there are two choices i'm aware of...
sly-goose
http://www.slygoosecables.com/index.php?page=shop.product_details&flyp age=flypage.tpl&product_id=16&category_id=36&option=com_virtuemart&Ite mid=2

and the always great ad infinitum
http://www.alexiles.com/
alex does make these special on request( you need to email him) but as of now(sept 2011..for all you in the future wigglers) he's swamped so it will take a hot minute.

EDIT by os:
Expert Sleepers now offer pre-made floating ring cables too:
http://expert-sleepers.co.uk/accessories.html
END edit

insert cables are a good choice
they look like this

and you can find more info here
http://www.zzounds.com/item--HOSSTP20
you can get these anywhere, but you can peep the link to read more about the cables if you like. of course, the eurorack massive needs 1/8 not 1/4. evidently, any 1/4 to 1/8 adaptor will work, either mono or stereo. they look like this....



coupler also found this solution. Although this box is getting harder to find.
Rean NYS-SSR-8 1/4" Patch Box 8 Send/Return Modules ($35 - http://www.amazon.com/Rean-NYS-SSR-8-Patch-Return-Modules/dp/B000PHK1G G)
8ch TRS cable snake
16 1/4" to 1/8" adapters from monoprice (0.50 each) edit: you need STEREO (trs) adapters to make this work with the patch box

Quote:
The Patch Box is meant for send/return on mixers, which basically means it takes TRS in on one side and spits out TS and RS on the other for each input. You just run the snake from your interface into this box, and then you don't need any special cables made just for silent way. Those 1/4"-1/8" adapters are super cheap on Monoprice, so just get 16 of those and put them all in the TS/TR outputs and then you can just use your normal modular cables to connect to the box. Or if you use a larger format modular then you obviously don't need the adapters...

Rean is a company recently launched by Neutrik, so the quality is pretty nice. I can attest that based on handling this little box, it probably will probably hold up nicely. It's pretty heavy and feels very sturdy. I'm very happy that I randomly found this little magic box. I haven't been able to find anything else like it.


if your a crafty sort, you can make your own.
Ring Floating Method (probably what you want if CV is involved)
Tip -> Tip
Ring -> Nothing
Shield -> Shield



okay, that's all i got. Hopefully this helps. if i said something wrong or if you have any additional info, please chime in.

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Bluebox
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Joined: 06 Oct 2011
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PostPosted: Mon Jan 09, 2012 9:56 pm    Post subject: Reply with quote Add User to Ignore List

I build Silent Way compatible TRS-1/8" cables as well... PM me.

I use high-quality Instalux wirestock and premium Neutrik termination. At the moment I am offering black and purple wirestock with black heatshrink over the 1/8" plug, or black wirestock with black Neutrik termination and "carbon-fiber"-look PET sleeve over the length of the cable.

Here's a link to give you a rough idea of what these cables look like:
http://www.muffwiggler.com/forum/viewtopic.php?p=636326&highlight=#635 901

Sorry if this seems like spam, I don't mean it that way. Just figured I'd let people know I am making these cables (in addition to regular patch cables).

Cheers,
-ian
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bsmith
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PostPosted: Mon Jan 09, 2012 10:10 pm    Post subject: Reply with quote Add User to Ignore List

One neato about using an insert cable kind of arrangement is that you get an inverted signal off the ring (as noted above) which can be useful.
I use these thingies out of my patch bay with a headphone adapter which I have collected a million of somehow over the years:
3.5mm TRS-Dual 3.5mm(F) Mono ($2 - $6)


and these are bitchin keen too to come out of the patch bay with a trs 1/4" to (trs' comes in the other side of what is seen in the image, take the signal out of the top black jacks for tip signal, the bottom red ones for ring inverted - I use a little adapter to convert to 3.5mm to take to euro when I use this thing):
Neutrik NYS-SSR-8 ($20-$30) - same as the rean thing matos linked to above.


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vstace
Learning to Wiggle


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PostPosted: Fri Jul 20, 2012 9:18 am    Post subject: Reply with quote Add User to Ignore List

Just chiming in to let you all know what I did to make a cheap floating ring patchbay. I had a 48 point deltron TRS patchbay laying around (I think it was less than $50 new) With this patchbay and perhaps many others, I was able to simply pull the guts out of a few pairs in the bay and disconnect the ring wire. Then I just used some 1/4 mono to 1/8 mono adapters with some instrument cables. The 1/4 to 1/8 mono adapters are 2 for $3 shipped on ebay. With only modding 3 stereo pairs I now have as 6 CV outs and the rest are regular TRS for recording or regular patching. Hope to help.
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Tronketz
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PostPosted: Sat Sep 08, 2012 8:49 pm    Post subject: Reply with quote Add User to Ignore List

Is this thread specifically for OUTPUTTING DC?

In other words, will I risk damaging my audio interface if I want to build TS cables for INPUTTING DC? My audio interface (MOTU ultralite mk3) can already output DC.

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os
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PostPosted: Sun Sep 09, 2012 7:25 am    Post subject: Reply with quote Add User to Ignore List

The MOTU interfaces do not have DC-coupled inputs. Very few do (I can't think of any off-hand).

I suggest you use Silent Way CV Input, and regular balanced audio cables.

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Tronketz
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PostPosted: Sun Sep 09, 2012 3:43 pm    Post subject: Reply with quote Add User to Ignore List

One more question: When using special cables to output computer CV, is the output bipolar or is it 0v and up?
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os
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PostPosted: Mon Sep 10, 2012 3:55 am    Post subject: Reply with quote Add User to Ignore List

I'll reply in the other thread you started.
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vstace
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PostPosted: Thu Oct 18, 2012 10:21 am    Post subject: Reply with quote Add User to Ignore List

I'm running out of DC outs on my interface.

Question: How can the inverted signal be used with the TRS split cables? Can the inverted ring side give me more usable pitch and gate outs? I'm guessing the pitch will be tracking backwards and the gate with be constant on, but can there be a new plugin developed to adjust for this?

Also, I assume it's possible and straight forward to run an ES-4 simultaneously with a DC coupled audio card?

Thanks
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os
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PostPosted: Thu Oct 18, 2012 10:36 am    Post subject: Reply with quote Add User to Ignore List

The inverted signal is only useful for e.g. LFOs where it gives you the opposite phase. It can't be used for extra CV/gate outs.

An ES-4 will run alongside the main DC-coupled outs fine (assuming you have S/PDIF out).

If the card is a MOTU make sure you read this thread.

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skecr8r
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PostPosted: Thu Dec 06, 2012 12:05 pm    Post subject: Reply with quote Add User to Ignore List

Just to get this straight:

I want to send from a Motu Ultralite. I don't currently have a snake laying around, but I do have a bunch of 1/4 TRS cables. This will work as well, right?

From this thread I gather I could buy the Neutrik/Rean NYS SSR-8, and patch the outputs from my Motu into the input side. I can then plug-in 1/4 to 1/8 STEREO adapters into the black send part of the patchbox and output CV using regular 1/8 to 1/8 Eurorack cables.

Is the above correct?
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os
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PostPosted: Thu Dec 06, 2012 1:04 pm    Post subject: Reply with quote Add User to Ignore List

It will work, but it ignores the "floating ring" advice.
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skecr8r
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PostPosted: Thu Dec 06, 2012 1:38 pm    Post subject: Reply with quote Add User to Ignore List

... I thought that was exactly what the NYS SSR-8 did, sent out a S only signal and an inverted signal?

Why the hell isn't there just some dude in Europe that makes these cables if even that solution doesn't solve the problem? Sly Goose wants more for the shipping than their cables.

Should I just get insert cables instead (something like this: http://robbi-pa.dk/images/thumbnails/850x560/FFFFFF/images/30304762.jp g)? And some stereo convertes 1/4" to 1/8"?
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os
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PostPosted: Thu Dec 06, 2012 2:50 pm    Post subject: Reply with quote Add User to Ignore List

I'm actually having some floating ring cables made - expect to have them for sale before the end of the month.

Insert cables are a good choice in the meantime.

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skecr8r
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PostPosted: Thu Dec 06, 2012 3:08 pm    Post subject: Reply with quote Add User to Ignore List

So, insert cables doesn't have the ring problem, is that correct? So if I buy the snake pictured I don't need additional cables, or do I need to buy some eventually like the ones you are having made?
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os
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PostPosted: Thu Dec 06, 2012 3:11 pm    Post subject: Reply with quote Add User to Ignore List

Insert cables effectively give you a floating ring. The downside is that you have a spare plug dangling around all the time, and you still need the 1/4" to 3.5mm adaptors.
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Tronketz
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PostPosted: Sat Dec 15, 2012 7:29 pm    Post subject: Reply with quote Add User to Ignore List

os wrote:
I'm actually having some floating ring cables made - expect to have them for sale before the end of the month.


I want! Is this happening?

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os
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PostPosted: Mon Dec 17, 2012 4:07 am    Post subject: Reply with quote Add User to Ignore List

Yes - just waiting on the delivery.
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Junk Rhythm
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PostPosted: Mon Dec 17, 2012 4:09 am    Post subject: Reply with quote Add User to Ignore List

os wrote:
Yes - just waiting on the delivery.


Is there a chance that US distributors might some in the future?

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os
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PostPosted: Mon Dec 17, 2012 4:12 am    Post subject: Reply with quote Add User to Ignore List

I'd like to think so.
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