DIY M/S box

Boby Stoica · 16th November 2004

Hello.
I'm heading for some stuuf to make a changep in mastering stuff - talking about a good EQ, another compressor besides the Avalon 747, and I'm thinking to aply the M/S technique when mastering, so:

Is there any schematics for doing the M/S thing properly - passive or active?

**DrDeltaM** · 19th November 2004

Gonna move this to the Geekslutz forum

gyraf · 19th November 2004

http://recforums.prosoundweb.com/ind...e1ad9fd618efb4

Jakob E.

hollywood_steve · 20th November 2004

I don't have the link handy, but the Jensen Transformer site has a library of schematics including a very straightforward M/S circuit that utilizes a pair of their transformers. Other than the transformers, the circuit is very basic, just a few resistors and the necessary connectors. One of the easiest pro audio DIY projects you will find. Its not super cheap, as the two transformers will set you back well over $100 (its been a few years, I don't remember the exact cost), but the only other costs are for a chassis/box to mount the circuit and a few bucks for some XLR connectors.

Good luck.

inaudio · 20th November 2004

Hmm, never heard of using transformers for M/S! I split the S channel to two inputs, flip phase on one, and you can control width by how loud the sides are compared to the centered M channel. So Simple! Did that for years for radio classsical broadcasts. Now I record a stereo track with M > L and S > R and use Waves S1.

<L>

DeadPoet · 20th November 2004

Lou, I think the original poster was asking the opposite -like it's done in mastering- making a M/S signal from a stereo L+R one

Herwig

inaudio · 21st November 2004

Lou, I think the original poster was asking the opposite -like it's done in mastering- making a M/S signal from a stereo L+R one

Right, I see. When I'm fixing up live to 2 track mixes (in PT) I do that with Waves S1... do stuff to the mid or side and recombine it. Not quite mastering, but helps some things!

<L>

16th November 2004	#1
Boby Stoica Gear maniac Joined: Dec 2003 Location: Bucharest, Romania Posts: 281 Thread Starter	DIY M/S box Hello. I'm heading for some stuuf to make a changep in mastering stuff - talking about a good EQ, another compressor besides the Avalon 747, and I'm thinking to aply the M/S technique when mastering, so: Is there any schematics for doing the M/S thing properly - passive or active?

20th November 2004	#4
hollywood_steve Lives for gear Joined: Jun 2002 Location: uh..... Hollywood Posts: 1,242	I don't have the link handy, but the Jensen Transformer site has a library of schematics including a very straightforward M/S circuit that utilizes a pair of their transformers. Other than the transformers, the circuit is very basic, just a few resistors and the necessary connectors. One of the easiest pro audio DIY projects you will find. Its not super cheap, as the two transformers will set you back well over $100 (its been a few years, I don't remember the exact cost), but the only other costs are for a chassis/box to mount the circuit and a few bucks for some XLR connectors. Good luck. __________________ steve Lexington 125 - High Resolution Location Recording lex125@pacbell.net http://www.lexington125.com

20th November 2004	#5
inaudio Gear maniac Joined: Apr 2004 Location: Marin County CA Posts: 156	Hmm, never heard of using transformers for M/S! I split the S channel to two inputs, flip phase on one, and you can control width by how loud the sides are compared to the centered M channel. So Simple! Did that for years for radio classsical broadcasts. Now I record a stereo track with M > L and S > R and use Waves S1. <L> __________________ Lou Judson Intuitive Audio 415-883-2689 inaudio@pacbell.net

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19th November 2004	#2
DrDeltaM Moderator Joined: Sep 2003 Location: Belgium Posts: 4,347	Gonna move this to the Geekslutz forum

19th November 2004	#3
gyraf Lives for gear Joined: Jun 2002 Location: Denmark Posts: 667	http://recforums.prosoundweb.com/ind...e1ad9fd618efb4 Jakob E.

20th November 2004	#6
DeadPoet Lives for gear Joined: Apr 2003 Location: Belgium Posts: 1,285	Lou, I think the original poster was asking the opposite -like it's done in mastering- making a M/S signal from a stereo L+R one Herwig

21st November 2004	#7
inaudio Gear maniac Joined: Apr 2004 Location: Marin County CA Posts: 156	Lou, I think the original poster was asking the opposite -like it's done in mastering- making a M/S signal from a stereo L+R one Right, I see. When I'm fixing up live to 2 track mixes (in PT) I do that with Waves S1... do stuff to the mid or side and recombine it. Not quite mastering, but helps some things! <L>