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Signal Chain Question

 
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louzucaro
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Joined: 13 Jul 2006
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Location: Chicago area

PostPosted: Sun Apr 01, 2007 8:50 pm    Post subject: Signal Chain Question Reply with quote

Hi,

I searched for this but either I wasn't using the right terms or I just didn't see it, so if that's the case, my apologies.

Ok, let's say you're gonna set up something like this:

Mic > Preamp > Firewire / USB Audio Interface > Computer

As far as I can tell, the majority of the Firewire / USB audio interfaces on the market don't allow you to bypass whatever the built-in preamp is on the XLR inputs.

In this case, would the best way to go be to go out of the Preamp through a 1/4" jack and then into the Audio Interface on 1/4" jack, rather than going out XLR and into the Audio Interface on XLR which, if non bypassable (new word), would I suppose double-pre your mic and add noise?

And if that's the case (Preamp > Audio Interface via 1/4") should it be a balanced connection or does it not matter so long as you're going into the Preamp from the Mic using a balanced XLR connection?

Thanks!
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brianforrester
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PostPosted: Sun Apr 01, 2007 9:04 pm    Post subject: Reply with quote

For example... using an mbox...

turn the input all the way down and you basically bypass the preamp and resultant coloration of the preamp in the box. I don't know it this is true on all interfaces, but it is for the mbox (unless of course somebody here proves me wrong, which will innevitably happen Wink )

Good luck... just remember, you can spend hours upon hours working on your hardware signal chain, all the while negletting the most important aspect of the chain... YOU! Subtle changes in your hardware configuration will not be an adequate subsitute for an underpracticed instument!

All the best,

Brian
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Yoda117
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PostPosted: Sun Apr 01, 2007 9:09 pm    Post subject: Reply with quote

If the FW/USB interface has a direct input, or can otherwise accept input from a source other than the XLR, Then the answer is "kinda".

You'll bypass the preamp, but not the circuitry of the device itself. In some cases, this might add some additional coloration to the sound. Depends on the device itself (those pesky state diagrams come into play if you really want to know).
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louzucaro
The Gates of Troy


Joined: 13 Jul 2006
Posts: 1915
Location: Chicago area

PostPosted: Sun Apr 01, 2007 9:18 pm    Post subject: Reply with quote

Thanks for the replies...

I know that the equipment is just that and that the talent is what's important, but I don't have the luxury of being able to make purchasing mistakes and most of the places I've checked with won't take returns on things that have software in them. Bleh. So I just want to make sure I'm not thinking along the lines of doing something that just flat out won't work.

So again, thanks!
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richgates
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PostPosted: Sun Apr 01, 2007 10:35 pm    Post subject: Reply with quote

I have the Pre-Sonus BlueTube going into the Firewire 410 from M-Audio and I keep the Firewire 410 turned down all the way and it works like a champ.
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louzucaro
The Gates of Troy


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Location: Chicago area

PostPosted: Sun Apr 01, 2007 10:43 pm    Post subject: Reply with quote

Cool, again, thanks...

And this is all via XLR ins/outs on the various devices?
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Lou Zucaro
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richgates
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PostPosted: Sun Apr 01, 2007 11:21 pm    Post subject: Reply with quote

louzucaro wrote:
Cool, again, thanks...

And this is all via XLR ins/outs on the various devices?


correct. Although in my case it is just a single XLR mic no other devices in the chain.
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louzucaro
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PostPosted: Mon Apr 02, 2007 5:18 am    Post subject: Reply with quote

Right, but the mic cable into the Blue Tube is XLR and then the cable from the Blue Tube to the Firewire 410 is also XLR?
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Lou Zucaro
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richgates
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PostPosted: Mon Apr 02, 2007 11:33 am    Post subject: Reply with quote

louzucaro wrote:
Right, but the mic cable into the Blue Tube is XLR and then the cable from the Blue Tube to the Firewire 410 is also XLR?


Correctamundo.
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louzucaro
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PostPosted: Mon Apr 02, 2007 1:20 pm    Post subject: Reply with quote

As Mr. Burns would say, "EXcellent!"

Thanks!
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Lou Zucaro
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Hart
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Joined: 03 Jan 2006
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PostPosted: Mon Apr 02, 2007 1:26 pm    Post subject: Reply with quote

But where do you put the rich gates in your chain?

Sorry, I couldn't resist.
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CWToo
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PostPosted: Mon Apr 02, 2007 5:35 pm    Post subject: Re: Signal Chain Question Reply with quote

louzucaro wrote:
As far as I can tell, the majority of the Firewire / USB audio interfaces on the market don't allow you to bypass whatever the built-in preamp is on the XLR inputs.


If I understand the question, which becomes doubtfull after sucking down a glass of Cabernet, you want to bypass the microphone preamps on your audio interface.

If that is the question, the answer on an Mbox is to switch the input to LINE, as LINE does not use preamps. Most other interfaces allow you to use LINE IN which should be independent of the type of connector the box uses.

Back to the Cabernet.
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richgates
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PostPosted: Mon Apr 02, 2007 5:46 pm    Post subject: Reply with quote

Hart wrote:
But where do you put the rich gates in your chain?

Sorry, I couldn't resist.


/groan Smile
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Hart
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PostPosted: Mon Apr 02, 2007 6:00 pm    Post subject: Reply with quote

Don't forget to tip your waitresses and bartenders. I'll be here all week. Remember the 9 o'clock show is completely different from the 7.
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louzucaro
The Gates of Troy


Joined: 13 Jul 2006
Posts: 1915
Location: Chicago area

PostPosted: Mon Apr 02, 2007 7:47 pm    Post subject: Reply with quote

Hart wrote:
Don't forget to tip your waitresses and bartenders. I'll be here all week. Remember the 9 o'clock show is completely different from the 7.


You forgot to recommend the veal...
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Lou Zucaro
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