Mid/Side encoder, splitter? Any project, schematics?

[aomahana]

Hi,

I have a spare Wayne Kirkwood MS Matrix pcb and associated THAT IC's.

This one ....
http://www.ka-electronics.com/kaelectronics/MS_Matrix/MS_Matrix.htm

If you want to buy it, PM me.


All the best,
aomahana.

 

[BGroen]

Did anyone try the 4 resistor passive scheme? Lossy?
Is grounding at M(+) correct?

 

[RuudNL]

Years ago I have built a M-S encoder/decoder, with fixed/variable M and S level (based on the work of Wayne Kirkwood) , an Elliptic Eq with variable frequencies, Solo and mute for M and S, combined with a low-cut and high-cut filter and a 'brick wall' 15 KHz filter. (Especially for vinyl.) There are also inserts for the M and S channels.

 

[telewulf]

Did anyone try the 4 resistor passive scheme? Lossy?
Is grounding at M(+) correct?

I asume you refer to the 8 resistor passive scheme by 5v333, right?

Well no, I haven´t because I was never much into vinyl, never liked coincidential microphones and was never working on stereo-FM-transmitters - and that are the only fields known to me, where MS applies.

But if I may drop in my thoughts on passive audio appliences: At first glance they look simple and thus very inviting but really it´s quite the opposite. The impedances of the driving source as well as the load come into the equation and so you must not take these 8 resistors on their own and expect a brilliant result. In order to decouple them from their surroundings, you need buffer amps before and after the matrix.
Are you familiar with op amps, say NE5534 and such like? If not, then google "tutorial op amp buffer".

best wishes from Bremen,
Wulf